Metadata Timeline (#6194)

* Create timeline table

* Fix indexes

* Add other fields

* Adjust schema to be less descriptive

* Handle timeline queue from tracked object data

* Setup timeline queue in events

* Add source id for index

* Add other fields

* Fixes

* Formatting

* Store better data

* Add api with filtering

* Setup basic UI for timeline in events

* Cleanups

* Add recordings snapshot url

* Start working on timeline ui

* Add tooltip with info

* Improve icons

* Fix start time with clip

* Move player logic back to clips

* Make box in timeline relative coordinates

* Make region relative

* Get box overlay working

* Remove overlay when playing again

* Add disclaimer when selecting overlay points

* Add docs for new apis

* Fix mobile

* Fix docs

* Change color of bottom center box

* Fix vscode formatting

frigate/models.py

@@ -32,6 +32,15 @@ class Event(Model):  # type: ignore[misc]
     plus_id = CharField(max_length=30)
 
 
+class Timeline(Model):  # type: ignore[misc]
+    timestamp = DateTimeField()
+    camera = CharField(index=True, max_length=20)
+    source = CharField(index=True, max_length=20)  # ex: tracked object, audio, external
+    source_id = CharField(index=True, max_length=30)
+    class_type = CharField(max_length=50)  # ex: entered_zone, audio_heard
+    data = JSONField()  # ex: tracked object id, region, box, etc.
+
+
 class Recordings(Model):  # type: ignore[misc]
     id = CharField(null=False, primary_key=True, max_length=30)
     camera = CharField(index=True, max_length=20)