Merge branch 'cache-get-policy' into 'main'

cacheGet policy changes

See merge request !16

example/cacheGet/1.0/data.json

 {
-  "namespace": "namespace",
+  "namespace": "mynamespace",
   "scope": "scope"
 }

example/cacheGet/1.0/policy.rego

@@ -2,4 +2,4 @@ package example.cacheGet
 
 default allow = false
 
-result := cache.get("mykey", "mynamespace", "myscope")
+result := cache.get(input.key, data.namespace, data.scope)