Clean up onvif and autotracking (#24559)

* simplify onvif and autotracking code

Removes about 230 lines from the ONVIF controller and autotracker without changing how PTZ moves are calculated. `OnvifController` no longer keeps its own `camera_configs` copy of the camera config, the cached `GetStatus`, `GetServiceCapabilities`, and `AbsoluteMove` request objects are gone in favor of plain dicts at the call site, and `PtzAutoTrackerThread` is merged into `PtzAutoTracker`. Repeated blocks in the autotracker (waiting for the motor to stop, disabling autotracking on a failed setup step) are now single helpers.

* use camera config for autotracking enabled state

Camera processes read autotracking state from a shared `autotracker_enabled` value that the dispatcher and autotracker had to keep in sync with the config by hand. Camera processes now subscribe to the `autotracking` and `onvif` config updates and read `onvif.autotracking.enabled` directly, so the shared value and the autotracker's mirroring method are gone. `_disable` now publishes its change so the camera process hears about it. Also removes `tracking_active`, which was set and cleared but never read.

* compute max target box from live zoom factor

* fix autotracking debug overlay max target box lookup

* make max target box a function of zoom factor

frigate/camera/state.py

@@ -16,7 +16,7 @@ from frigate.config import (
     ZoomingModeEnum,
 )
 from frigate.const import CLIPS_DIR, THUMB_DIR
-from frigate.ptz.autotrack import PtzAutoTrackerThread
+from frigate.ptz.autotrack import PtzAutoTracker, calculate_max_target_box
 from frigate.track.tracked_object import TrackedObject
 from frigate.util.image import (
     SharedMemoryFrameManager,
@@ -35,7 +35,7 @@ class CameraState:
         name: str,
         config: FrigateConfig,
         frame_manager: SharedMemoryFrameManager,
-        ptz_autotracker_thread: PtzAutoTrackerThread,
+        ptz_autotracker_thread: PtzAutoTracker,
     ) -> None:
         self.name = name
         self.config = config
@@ -115,17 +115,13 @@ class CameraState:
                 # draw thicker box around ptz autotracked object
                 if (
                     self.camera_config.onvif.autotracking.enabled
-                    and self.ptz_autotracker_thread.ptz_autotracker.autotracker_init.get(
-                        self.name
-                    )
-                    and self.ptz_autotracker_thread.ptz_autotracker.tracked_object[
-                        self.name
-                    ]
+                    and self.ptz_autotracker_thread.autotracker_init.get(self.name)
+                    and self.ptz_autotracker_thread.tracked_object[self.name]
                     is not None
                     and obj["id"]
-                    == self.ptz_autotracker_thread.ptz_autotracker.tracked_object[
+                    == self.ptz_autotracker_thread.tracked_object[  # type: ignore[union-attr]
                         self.name
-                    ].obj_data["id"]  # type: ignore[attr-defined]
+                    ].obj_data["id"]
                     and obj["frame_time"] == frame_time
                 ):
                     thickness = 5
@@ -138,9 +134,9 @@ class CameraState:
                         and self.camera_config.detect.width is not None
                         and self.camera_config.detect.height is not None
                     ):
-                        max_target_box = self.ptz_autotracker_thread.ptz_autotracker.tracked_object_metrics[
-                            self.name
-                        ]["max_target_box"]  # type: ignore[index]
+                        max_target_box = calculate_max_target_box(
+                            self.camera_config.onvif.autotracking.zoom_factor
+                        )
                         side_length = max_target_box * (
                             max(
                                 self.camera_config.detect.width,