Typing Part 3: events.py (#3352)

* Typing: events.py

* Remove unused variable

* Fix return Any from return statement

Not all elements from the event dict are sure to be something that can be evaluated

See e.g.: https://github.com/python/mypy/issues/5697

* Sort out Event disambiguity

There was a name collision of multiprocessing Event type and frigate events

Co-authored-by: Sebastian Englbrecht <sebastian.englbrecht@kabelmail.de>

frigate/watchdog.py

@@ -7,13 +7,13 @@ import signal
 
 from frigate.object_detection import ObjectDetectProcess
 from frigate.util import restart_frigate
-from multiprocessing.synchronize import Event
+from multiprocessing.synchronize import Event as MpEvent
 
 logger = logging.getLogger(__name__)
 
 
 class FrigateWatchdog(threading.Thread):
-    def __init__(self, detectors: dict[str, ObjectDetectProcess], stop_event: Event):
+    def __init__(self, detectors: dict[str, ObjectDetectProcess], stop_event: MpEvent):
         threading.Thread.__init__(self)
         self.name = "frigate_watchdog"
         self.detectors = detectors