Option for granular service endpoint access control

[rlindner81]

Our FeatureService has

read endpoints,

• /rest/feature/state

write endpoints,

• /rest/feature/redisUpdate
• /rest/feature/redisRead

and admin/debug endpoints

• /rest/feature/redisSendCommand

I want to be able to set dedicated access roles for the

both read and write endpoints, =>serviceAccessRoles ?? ["system-user"]

read endpoints, =>readAccessRoles ?? serviceAccessRoles ?? ["system-user"]

write endpoints, =>writeAccessRoles ?? serviceAccessRoles ?? ["system-user"]

admin endpoints, =>adminAccessRoles ?? []