diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 20ad6ebf4f2a519e2aa0fa8e3a01c80470053df2..7ba775a534d64291955648e24da611f3c5a3cd99 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,65 +1,31 @@
-variables:
-  HELPERS_FILE: docker-build.yml
-  HELM_HELPERS_FILE: helm.yml
-  APP_HELM_NAME: cache
-  DOCKER_FILE: deployment/ci/Dockerfile
-
 stages:
-  - compile
   - test
-  - build
-  - helm
-  - deploy
 
-include:
-  - project: "${HELPERS_PATH}"
-    file: "${HELPERS_FILE}"
-  - template: "Workflows/Branch-Pipelines.gitlab-ci.yml"
-  - project: "$HELM_HELPERS_PATH}"
-    file: "${HELM_HELPERS_FILE}"
+before_script:
+  - ln -s /builds /go/src/gitlab.eclipse.org
+  - cd /go/src/gitlab.eclipse.org/${CI_PROJECT_PATH}
 
-lint:
-  image: golangci/golangci-lint:v1.50.1
+linters:
+  image: golangci/golangci-lint:latest
   stage: test
-  tags:
-    - amd64-docker
   script:
+    - go version
     - golangci-lint --version
     - golangci-lint run
-  before_script:
-    - ln -s /builds /go/src/gitlab.com
-    - cd /go/src/gitlab.com/${CI_PROJECT_PATH}
 
 unit tests:
-  image: golang:1.19.4
-  extends: .gotest
+  image: golang:1.21.3
   stage: test
-  tags:
-    - amd64-docker
-  before_script: []
+  script:
+    - go version
+    - go test -race ./... -coverprofile=coverage.out
+    - go tool cover -func=coverage.out
   coverage: '/total:\s+\(statements\)\s+(\d+.\d+\%)/'
 
 govulncheck:
-  image: golang:1.19.4
+  image: golang:1.21.3
   stage: test
-  tags:
-    - amd64-docker
-  before_script:
-    - ln -s /builds /go/src/gitlab.com
-    - cd /go/src/gitlab.com/${CI_PROJECT_PATH}
   script:
     - go version
     - go install golang.org/x/vuln/cmd/govulncheck@latest
     - govulncheck ./...
-
-amd64:
-  extends: .docker-build
-  stage: build
-  tags:
-    - amd64-docker
-
-helm-lint:
-  extends: .helm-lint
-  stage: helm
-  tags:
-    - amd64-docker
diff --git a/deployment/ci/Dockerfile b/deployment/ci/Dockerfile
index c668c9e2e46a2f1d73aa3c8e0b78edd6105d4872..45bf93bb5061821db882130f7b9b826806af4ee0 100644
--- a/deployment/ci/Dockerfile
+++ b/deployment/ci/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.21.0-alpine3.17 as builder
+FROM golang:1.21.3-alpine3.17 as builder
 
 RUN apk add git
 
diff --git a/deployment/compose/Dockerfile b/deployment/compose/Dockerfile
index a4454b07779256729ca3b421ce553abcabde3565..e9d3baeaf73b41a653953d21efab82ca482ce244 100644
--- a/deployment/compose/Dockerfile
+++ b/deployment/compose/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.21.0
+FROM golang:1.21.3
 
 RUN go install github.com/ysmood/kit/cmd/guard@v0.25.11
 
diff --git a/go.mod b/go.mod
index 736747438d02e70c24be269f729c9637cc3a6051..b829da08f6653aa13df91e531c082f2f98cb36cf 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module gitlab.eclipse.org/eclipse/xfsc/tsa/cache
 
-go 1.20
+go 1.21
 
 require (
 	github.com/cloudevents/sdk-go/protocol/nats/v2 v2.14.0
diff --git a/go.sum b/go.sum
index ce9b02b0e80b1313772c1d3b4a3f1f45867c7940..0d7a4c8df804f1782418b637e150a6cf2954f9ae 100644
--- a/go.sum
+++ b/go.sum
@@ -1,8 +1,11 @@
 github.com/benbjohnson/clock v1.3.0 h1:ip6w0uFQkncKQ979AypyG0ER7mqUSBdKLOgAle/AT8A=
+github.com/benbjohnson/clock v1.3.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/bsm/ginkgo/v2 v2.7.0 h1:ItPMPH90RbmZJt5GtkcNvIRuGEdwlBItdNVoyzaNQao=
+github.com/bsm/ginkgo/v2 v2.7.0/go.mod h1:AiKlXPm7ItEHNc/2+OkrNG4E0ITzojb9/xWzvQ9XZ9w=
 github.com/bsm/gomega v1.26.0 h1:LhQm+AFcgV2M0WyKroMASzAzCAJVpAxQXv4SaI9a69Y=
+github.com/bsm/gomega v1.26.0/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cloudevents/sdk-go/protocol/nats/v2 v2.14.0 h1:cPOXwhwRb+RtHrPSs6Qmobgt4q/0e4wNBdfUjOeV9Qw=
@@ -30,8 +33,10 @@ github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/gxui v0.0.0-20151028112939-f85e0a97b3a4 h1:OL2d27ueTKnlQJoqLW2fc9pWYulFnJYLWzomGV7HqZo=
+github.com/google/gxui v0.0.0-20151028112939-f85e0a97b3a4/go.mod h1:Pw1H1OjSNHiqeuxAduB1BKYXIwFtsyrY47nEqSgEiCM=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gopherjs/gopherjs v1.17.2 h1:fQnZVsXk8uxXIStYb0N4bGk7jeyTalG/wsZjQ25dO0g=
@@ -48,9 +53,11 @@ github.com/klauspost/compress v1.16.7 h1:2mk3MPGNzKyxErAw8YaohYh69+pa4sIQSC0fPGC
 github.com/klauspost/compress v1.16.7/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/lestrrat-go/blackmagic v1.0.1 h1:lS5Zts+5HIC/8og6cGHb0uCcNCa3OUt1ygh3Qz2Fe80=
 github.com/lestrrat-go/blackmagic v1.0.1/go.mod h1:UrEqBzIR2U6CnzVyUtfM6oZNMt/7O7Vohk2J0OGSAtU=
 github.com/lestrrat-go/httpcc v1.0.1 h1:ydWCStUeJLkpYyjLDHihupbn2tYmZ7m22BGkcvZZrIE=
@@ -67,6 +74,7 @@ github.com/lestrrat-go/option v1.0.1/go.mod h1:5ZHFbivi4xwXxhxY9XHDe2FHo6/Z7WWmt
 github.com/manveru/faker v0.0.0-20171103152722-9fbc68a78c4d h1:Zj+PHjnhRYWBK6RqCDBcAhLXoi3TzC27Zad/Vn+gnVQ=
 github.com/manveru/faker v0.0.0-20171103152722-9fbc68a78c4d/go.mod h1:WZy8Q5coAB1zhY9AOBJP0O6J4BuDfbupUDavKY+I3+s=
 github.com/manveru/gobdd v0.0.0-20131210092515-f1a17fdd710b h1:3E44bLeN8uKYdfQqVQycPnaVviZdBLbizFhU49mtbe4=
+github.com/manveru/gobdd v0.0.0-20131210092515-f1a17fdd710b/go.mod h1:Bj8LjjP0ReT1eKt5QlKjwgi5AFm5mI6O1A2G4ChI0Ag=
 github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
 github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
 github.com/minio/highwayhash v1.0.2 h1:Aak5U0nElisjDCfPSG79Tgzkn2gl66NxOMspRrKnA/g=
@@ -79,6 +87,7 @@ github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjY
 github.com/nats-io/jwt/v2 v2.4.1 h1:Y35W1dgbbz2SQUYDPCaclXcuqleVmpbRa7646Jf2EX4=
 github.com/nats-io/jwt/v2 v2.4.1/go.mod h1:24BeQtRwxRV8ruvC4CojXlx/WQ/VjuwlYiH+vu/+ibI=
 github.com/nats-io/nats-server/v2 v2.7.4 h1:c+BZJ3rGzUKCBIM4IXO8uNT2u1vajGbD1kPA6wqCEaM=
+github.com/nats-io/nats-server/v2 v2.7.4/go.mod h1:1vZ2Nijh8tcyNe8BDVyTviCd9NYzRbubQYiEHsvOQWc=
 github.com/nats-io/nats.go v1.13.1-0.20220308171302-2f2f6968e98d h1:zJf4l8Kp67RIZhoVeniSLZs69SHNgjLHz0aNsqPPlx8=
 github.com/nats-io/nats.go v1.13.1-0.20220308171302-2f2f6968e98d/go.mod h1:BPko4oXsySz4aSWeFgOHLZs3G4Jq4ZAyE6/zMCxRT6w=
 github.com/nats-io/nkeys v0.3.0/go.mod h1:gvUNGjVcM2IPr5rCsRsC6Wb3Hr2CQAm08dsxtV6A5y4=
@@ -107,6 +116,7 @@ github.com/sergi/go-diff v1.3.1/go.mod h1:aMJSSKb2lpPvRNec0+w3fl7LP9IOFzdc9Pa4NF
 github.com/smartystreets/assertions v1.13.0 h1:Dx1kYM01xsSqKPno3aqLnrwac2LetPvN23diwyr69Qs=
 github.com/smartystreets/assertions v1.13.0/go.mod h1:wDmR7qL282YbGsPy6H/yAsesrxfxaaSlJazyFLYVFx8=
 github.com/smartystreets/goconvey v1.7.2 h1:9RBaZCeXEQ3UselpuwUQHltGVXvdwm6cv1hgR6gDIPg=
+github.com/smartystreets/goconvey v1.7.2/go.mod h1:Vw0tHAZW6lzCRk3xgdin6fKYcG+G3Pg9vgXWeJpQFMM=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
@@ -118,12 +128,14 @@ github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
+github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 github.com/zach-klippenstein/goregen v0.0.0-20160303162051-795b5e3961ea h1:CyhwejzVGvZ3Q2PSbQ4NRRYn+ZWv5eS1vlaEusT+bAI=
 github.com/zach-klippenstein/goregen v0.0.0-20160303162051-795b5e3961ea/go.mod h1:eNr558nEUjP8acGw8FFjTeWvSgU1stO7FAO6eknhHe4=
 gitlab.eclipse.org/eclipse/xfsc/tsa/golib v1.3.2-0.20230810143053-d53786b08923 h1:ayI4Qs9bPMuAccDM9pBGMnO1EXYyIPgK4EvlD4Kffs4=
 gitlab.eclipse.org/eclipse/xfsc/tsa/golib v1.3.2-0.20230810143053-d53786b08923/go.mod h1:csApc+9NYX7AoquLOLu644c/uxuPAVhv+kJpOAe3npg=
 go.uber.org/goleak v1.2.0 h1:xqgm/S+aQvhWFTtR0XK3Jvg7z8kGV8P4X14IzwN3Eqk=
+go.uber.org/goleak v1.2.0/go.mod h1:XJYK+MuIchqpmGmUSAzotztawfKvYLUIgg7guXrwVUo=
 go.uber.org/multierr v1.10.0 h1:S0h4aNzvfcFsC3dRF1jLoaov7oRaKqRGC/pUEJ2yvPQ=
 go.uber.org/multierr v1.10.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 go.uber.org/zap v1.25.0 h1:4Hvk6GtkucQ790dqmj7l1eEnRdKm3k3ZUrUMS2d5+5c=
@@ -173,6 +185,7 @@ golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/text v0.11.0 h1:LAntKIrcmeSKERyiOh0XMV39LXS8IE9UL2yP7+f5ij4=
 golang.org/x/text v0.11.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac h1:7zkz7BUtwNFFqcowJ+RIgu2MaV/MapERkDIy+mwPyjs=
+golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
@@ -188,6 +201,7 @@ google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqw
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=