Add cache service unit tests

README.md

go.mod

internal/service/cache/cachefakes/fake_cache.go

internal/service/cache/service.go

internal/service/cache/service_test.go

vendor/code.vereign.com/gaiax/tsa/golib/ptr/ptr.go

vendor/github.com/davecgh/go-spew/LICENSE

vendor/github.com/davecgh/go-spew/spew/bypass.go

vendor/github.com/davecgh/go-spew/spew/bypasssafe.go

vendor/github.com/davecgh/go-spew/spew/common.go

vendor/github.com/davecgh/go-spew/spew/config.go

vendor/github.com/davecgh/go-spew/spew/doc.go

vendor/github.com/davecgh/go-spew/spew/dump.go

vendor/github.com/davecgh/go-spew/spew/format.go

vendor/github.com/davecgh/go-spew/spew/spew.go

vendor/github.com/pmezard/go-difflib/LICENSE

vendor/github.com/pmezard/go-difflib/difflib/difflib.go

vendor/github.com/stretchr/testify/LICENSE

...r/github.com/stretchr/testify/assert/assertion_compare.go

...or/github.com/stretchr/testify/assert/assertion_format.go