Closes #14312: Move ConfigRevision to core (#14328)

* Move ConfigRevision model & write migrations

* Move ConfigRevision resources from extras to core

* Extend migration to update original content type for ConfigRevision

netbox/core/signals.py

@@ -1,5 +1,8 @@
+from django.db.models.signals import post_save
 from django.dispatch import Signal, receiver
 
+from .models import ConfigRevision
+
 __all__ = (
     'post_sync',
     'pre_sync',
@@ -19,3 +22,11 @@ def auto_sync(instance, **kwargs):
 
     for autosync in AutoSyncRecord.objects.filter(datafile__source=instance).prefetch_related('object'):
         autosync.object.sync(save=True)
+
+
+@receiver(post_save, sender=ConfigRevision)
+def update_config(sender, instance, **kwargs):
+    """
+    Update the cached NetBox configuration when a new ConfigRevision is created.
+    """
+    instance.activate()