* Save initial frame of new objects to frame cache
Objects that move quickly through the frame and are only seen briefly may not have the update() method called to save thumbnail_data, and may not have the initial frame saved to the tracked object frame cache. This caused a "Frame missing from frame cache" message that was patched by #7313 but this sometimes caused the wrong frame to be chosen for the thumb/snapshot.
* Tracking tweaks
- When registering new objects, use the past detections from Norfair to populate self.positions and self.stationary_box_history. This prevents the first call of update_position() from triggering a +1 on the object's stationary count (because the iou would be 1.0).
- Add a specific tracker for dedicated LPR cam license_plate objects using a lower R value and higher distance threshold to account for fast moving plates.
- Add helpful debug messages and keep them disabled with `if False:`
* Correctly ensure updates are more periodic when lpr or face detection is needed
* Cleanup
* Update api schema
* Don't update for stationary objects
* Simplify check
* Remove
* remove license plate from attributes for dedicated lpr cameras
* ensure we always have a color
* use frigate+ models with dedicated lpr cameras
* docs
* docs clarity
* docs enrichments
* use license_plate as object type
* Increase frequency of updates when internal face detection is used
* Adjust number of required faces based on detection type
* Adjust min_score config to unknown_score
* Only for person
* Improve typing
* Update face rec docs
* Cleanup ui colors
* Cleanup
* config options
* processing in maintainer
* detect and process dedicated lpr plates
* create camera type, add manual event and save snapshot
* use const
* ensure lpr events are always detections, typing fixes
* docs
* docs tweaks
* add preprocessing and penalization for low confidence chars
* Fix case where objects are returned as null
* Fix enabled status not being persisted
* Use config as source of truth when refreshed
* Ensure camera always have config object updated
* Cleanup typing
* backend
* backend fixes
* api for search queries
* frontend
* docs
* add filterable scroll list to more filters pane for identifiers
* always publish identifier
