Add object filter ratio (#2952)

* Add object ratio config parameters

Issue: #2948

* Add config test for object filter ratios

Issue: #2948

* Address review comments

- Accept `ratio` default
- Rename `bounds` to `box` for consistency
- Add migration for new field

Issue: #2948

* Fix logical errors

- field migrations require default values
- `clipped` referenced the wrong index for region, since it shifted
- missed an inclusion of `ratio` for detections in `process_frames`
- revert naming `o[2]` as `box` since it is out of scope!

This has now been test-run against a video, so I believe the kinks are
worked out.

Issue: #2948

* Update contributing notes for `make`

Issue: #2948

* Fix migration

- Ensure that defaults match between Event and migration script
- Deconflict migration script number (from rebase)

Issue: #2948

* Filter objects out of ratio bounds

Issue: #2948

* Update migration file to 009

Issue: #2948

frigate/events.py

@@ -105,6 +105,7 @@ class EventProcessor(threading.Thread):
                     region=event_data["region"],
                     box=event_data["box"],
                     area=event_data["area"],
+                    ratio=event_data["ratio"],
                     has_clip=event_data["has_clip"],
                     has_snapshot=event_data["has_snapshot"],
                 ).where(Event.id == event_data["id"]).execute()
@@ -124,6 +125,7 @@ class EventProcessor(threading.Thread):
                         region=event_data["region"],
                         box=event_data["box"],
                         area=event_data["area"],
+                        ratio=event_data["ratio"],
                         has_clip=event_data["has_clip"],
                         has_snapshot=event_data["has_snapshot"],
                     ).where(Event.id == event_data["id"]).execute()