* Closes#20003: Introduce mechanism to register callbacks for webhook context
* Swap ContentType with ObjectType
* Add plugin dev documentation for webhook callbacks
* Fix tests
* Add note about namespacing webhook data
* Convert ObjectType to a concrete child model of ContentType
* Add public flag to ObjectType
* Catch post_migrate signal to update ObjectTypes
* Reference ObjectType records instead of registry for feature support
* Automatically create ObjectTypes
* Introduce has_feature() utility function
* ObjectTypeManager should not inherit from ContentTypeManager
* Misc cleanup
* Don't populate ObjectTypes during migration
* Don't automatically create ObjectTypes when a ContentType is created
* Fix test
* Extend has_feature() to accept a model or OT/CT
* Misc cleanup
* Deprecate get_for_id() on ObjectTypeManager
* Rename contenttypes.py to object_types.py
* Add index to features ArrayField
* Keep FK & M2M fields pointing to ContentType
* Add get_for_models() to ObjectTypeManager
* Add tests for manager methods & utility functions
* Fix migrations for M2M relations to ObjectType
* model_is_public() should return False for non-core & non-plugin models
* Order ObjectType by app_label & model name
* Resolve migrations conflict
* Add message field to ObjectChange model
* Set max length on changelog message
* Enable changelog messages for single object operations
* Fix tests
* Add changelog message support for bulk edit & bulk delete
* Cosmetic improvements to form fields
* Fix bulk operation templates
* Add message support for bulk import/update
* Add REST API support for changelog messages (WIP)
* Fix changelog_message assignment
* Enable changelog message support for bulk deletions
* Add documentation
* Fix changelog message support for VirtualChassis
* Add ChangeLoggingMixin to necesssary model forms
* Introduce get_random_string() utility function for tests
* Incorporate changelog messages for object view tests
* Incorporate changelog messages for object bulk view tests
* Add missing mixins for changelog message support
* Tweak test to generate expected number of change records
* Finish adding tests for changelog message functionality
* Misc cleanup
* Fixes#19956: Prevent duplicate deletion records from cascading deletions
* Tweak bulk deletion test to work around cascading deletions issue
* Correct API URL
* Initial work on #19589
* Add tooling for handling background requests
* UI notification should link to enqueued job
* Use an informative name for the job
* Disable background jobs for file uploads
* Closes#19231: Add bulk renaming support for all models
* Introduce a template filter for getattr()
* Extend BulkRenameView to support arbitrary field names
* Address bulk renaming support for remaining models
* Bulk rename URL resolution should fail silently
* Update documentation
* Fix bulk button rendering for HTMX requests
* Initial work on #19735
* Work in progress
* Remove ClusterRemoveDevicesView (anti-pattern)
* Misc cleanup
* Fix has_bulk_actions
* Fix has_bulk_actions for ObjectChildrenView
* Restore clone button
* Misc cleanup
* Clean up custom bulk actions
* Rename individual object actions
* Collapse into a single template tag
* Fix support for legacy action dicts
* Rename bulk attr to multi
* clone_button tag should fail silently if view name is invalid
* Clean up action buttons
* Fix export button label
* Replace clone_button with an ObjectAction
* Create object actions for adding device/VM components
* Move core_sync.html to core app
* Remove extra_bulk_buttons from template doc
* On delete signal handling, manually save the related object in a ManyToOneRel to trigger a change record
* Only set remote field to None if null=True on the relation
