Make logging code self-contained (#13785)

* Make logging code self-contained.

Rewrite logging code to use python's builting QueueListener, effectively
moving the logging process into a thread of the Frigate app.

Also, wrap this behaviour in a easy-to-use context manager to encourage
some consistency.

* Fixed typing errors

* Remove todo note from log filter

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

* Do not access log record's msg directly

* Clear all root handlers before starting app

---------

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

frigate/__main__.py

@@ -1,17 +1,28 @@
 import faulthandler
+import logging
 import threading
 
 from flask import cli
 
 from frigate.app import FrigateApp
 
-faulthandler.enable()
 
-threading.current_thread().name = "frigate"
+def main() -> None:
+    faulthandler.enable()
+
+    # Clear all existing handlers.
+    logging.basicConfig(
+        level=logging.INFO,
+        handlers=[],
+        force=True,
+    )
+
+    threading.current_thread().name = "frigate"
+    cli.show_server_banner = lambda *x: None
+
+    # Run the main application.
+    FrigateApp().start()
 
-cli.show_server_banner = lambda *x: None
 
 if __name__ == "__main__":
-    frigate_app = FrigateApp()
-
-    frigate_app.start()
+    main()