Add a notice registry and System Health tab (#24178)

* add a notice registry and System Health tab

Problems Frigate detects on its own (ffmpeg crash loops, stuck detectors, failed model downloads, recordings deleted before their retention period) only ever existed as log lines. This adds a `NoticeRegistry` in the main process backed by two tables, an `update_notice` IPC topic so producers in other processes can reach it through the dispatcher, an admin-only API and websocket topic, and a Health tab that lists them. Kinds declare their own mode, severity, and category in one place: state notices are resolved by their producer, event notices are dismissed by the user.

* treat a prerelease as behind its final release

* fix notices clearing early

* rename menu items and update docs

* don't resolve the update notice on a failed version lookup

frigate/app.py

@@ -62,6 +62,8 @@ from frigate.log import _stop_logging
 from frigate.models import (
     Event,
     Export,
+    Notice,
+    NoticeStats,
     Previews,
     Recordings,
     RecordingsToDelete,
@@ -71,6 +73,7 @@ from frigate.models import (
     Trigger,
     User,
 )
+from frigate.notices.registry import NoticeRegistry
 from frigate.object_detection.base import ObjectDetectProcess
 from frigate.object_detection.util import detection_frame_size
 from frigate.output.output import OutputProcess
@@ -294,6 +297,8 @@ class FrigateApp:
         models = [
             Event,
             Export,
+            Notice,
+            NoticeStats,
             Previews,
             Recordings,
             RecordingsToDelete,
@@ -305,6 +310,10 @@ class FrigateApp:
         ]
         self.db.bind(models)
 
+        self.notice_registry = NoticeRegistry()
+        # producers confirm state notices again at startup if they still hold
+        self.notice_registry.mark_state_notices_unconfirmed()
+
     def check_db_data_migrations(self) -> None:
         # check if vacuum needs to be run
         if not os.path.exists(f"{CONFIG_DIR}/.exports"):
@@ -354,6 +363,7 @@ class FrigateApp:
             self.onvif_controller,
             self.ptz_metrics,
             comms,
+            notice_registry=self.notice_registry,
         )
         self.dispatcher.start_communicators()
 
@@ -500,7 +510,9 @@ class FrigateApp:
         self.record_cleanup.start()
 
     def start_storage_maintainer(self) -> None:
-        self.storage_maintainer = StorageMaintainer(self.config, self.stop_event)
+        self.storage_maintainer = StorageMaintainer(
+            self.config, self.stop_event, self.notice_registry
+        )
         self.storage_maintainer.start()
 
     def start_stats_emitter(self) -> None:
@@ -514,11 +526,14 @@ class FrigateApp:
                 self.processes,
             ),
             self.stop_event,
+            notice_registry=self.notice_registry,
         )
         self.stats_emitter.start()
 
     def start_watchdog(self) -> None:
-        self.frigate_watchdog = FrigateWatchdog(self.detectors, self.stop_event)
+        self.frigate_watchdog = FrigateWatchdog(
+            self.detectors, self.stop_event, self.notice_registry
+        )
 
         # (attribute on self, key in self.processes, factory)
         specs: list[tuple[str, str, Callable[[], FrigateProcess]]] = [
@@ -686,6 +701,7 @@ class FrigateApp:
                     self.dispatcher,
                     self.profile_manager,
                     config_holder=self.config_holder,
+                    notice_registry=self.notice_registry,
                 ),
                 host="127.0.0.1",
                 port=5001,