[TASK] Implement WorkspaceAwareRecordService in PageService

This change:

* Implements WorkspaceAwareRecordService as replacement for current workspace implementation in Service.
* Removes redundant code no longer required for workspace operation.
* Cleans up class inclusions FQN -> short name.
* Removes a try/catch that would never be activated.
* Removes an internal cache already handled by other code.
* Fixes bugs exposed by the service introduction.