Make the namespace and scope fields optional when setting and getting values from cache

@yordan.kinkov @valerii.kalashnikov

design/types.go

@@ -7,7 +7,7 @@ var CacheGetRequest = Type("CacheGetRequest", func() {
 	Field(1, "key", String)
 	Field(2, "namespace", String)
 	Field(3, "scope", String) // Initial implementation with a single scope
-	Required("key", "namespace", "scope")
+	Required("key")
 })
 
 var CacheSetRequest = Type("CacheSetRequest", func() {
@@ -15,5 +15,5 @@ var CacheSetRequest = Type("CacheSetRequest", func() {
 	Field(2, "key", String)
 	Field(3, "namespace", String)
 	Field(4, "scope", String) // Initial implementation with a single scope
-	Required("data", "key", "namespace", "scope")
+	Required("data", "key")
 })