This commit allows skipping authentication, permission checks, and certain filters (e.g., deletions, expirations) when the ACL mode is set to "none" (open relay mode). It also introduces a configuration option to disable query caching to reduce memory usage. These changes improve operational flexibility for open relay setups and resource-constrained environments.
Introduce comprehensive tests for policy validation logic, including owner and policy admin scenarios. Update `HandlePolicyConfigUpdate` to differentiate permissions for owners and policy admins, enforcing stricter field restrictions and validation flows.
