feat(connectors): stop event listeners when cache disabled

[bjoernsteinhagen]

To discuss:

• With these changes, we will lose marking model cards as expired. Happy?

Changes:

• Revit: When DisableCache=true, the DocumentChanged event isn't subscribed to at all — using the existing subscribe/unsubscribe pattern that was already there for DocumentChangeListeningDisabled
• AutoCAD/Civil3D: The event still fires (can't unsubscribe from anonymous lambdas?), but the callback exits immediately before doing anything
• Tekla: Same — exits immediately at the top of OnModelObjectChanged
• Rhino: Has too many scattered event callbacks to guard individually, so RunExpirationChecks itself exits immediately and clears the accumulated IDs

From my understanding: when cache is disabled, no object IDs are accumulated, RunExpirationChecks never runs, EvictObjects is never called. The change tracking pipeline is a no-op.

Testing:

• Revit
• Rhino
• Tekla
• AutoCAD
• Civil3D
• Plant3D

[linear]

CNX-3299 Stop Event Listeners when Cache Disabled