Add isort and ruff linter (#6575)

* Add isort and ruff linter

Both linters are pretty common among modern python code bases.

The isort tool provides stable sorting and grouping, as well as pruning
of unused imports.

Ruff is a modern linter, that is very fast due to being written in rust.
It can detect many common issues in a python codebase.

Removes the pylint dev requirement, since ruff replaces it.

* treewide: fix issues detected by ruff

* treewide: fix bare except clauses

* .devcontainer: Set up isort

* treewide: optimize imports

* treewide: apply black

* treewide: make regex patterns raw strings

This is necessary for escape sequences to be properly recognized.

frigate/record/maintainer.py

@@ -9,14 +9,14 @@ import random
 import string
 import subprocess as sp
 import threading
-import psutil
-
 from collections import defaultdict
 from multiprocessing.synchronize import Event as MpEvent
 from pathlib import Path
 from typing import Any, Tuple
 
-from frigate.config import RetainModeEnum, FrigateConfig
+import psutil
+
+from frigate.config import FrigateConfig, RetainModeEnum
 from frigate.const import CACHE_DIR, MAX_SEGMENT_DURATION, RECORD_DIR
 from frigate.models import Event, Recordings
 from frigate.types import RecordMetricsTypes
@@ -63,7 +63,7 @@ class RecordingMaintainer(threading.Thread):
                     for nt in flist:
                         if nt.path.startswith(CACHE_DIR):
                             files_in_use.append(nt.path.split("/")[-1])
-            except:
+            except psutil.Error:
                 continue
 
         # group recordings by camera
@@ -115,7 +115,7 @@ class RecordingMaintainer(threading.Thread):
                 Event.select()
                 .where(
                     Event.camera == camera,
-                    (Event.end_time == None)
+                    (Event.end_time is None)
                     | (Event.end_time >= recordings[0]["start_time"].timestamp()),
                     Event.has_clip,
                 )
@@ -127,7 +127,7 @@ class RecordingMaintainer(threading.Thread):
 
                 # Just delete files if recordings are turned off
                 if (
-                    not camera in self.config.cameras
+                    camera not in self.config.cameras
                     or not self.process_info[camera]["record_enabled"].value
                 ):
                     Path(cache_path).unlink(missing_ok=True)
@@ -394,4 +394,4 @@ class RecordingMaintainer(threading.Thread):
             duration = datetime.datetime.now().timestamp() - run_start
             wait_time = max(0, 5 - duration)
 
-        logger.info(f"Exiting recording maintenance...")
+        logger.info("Exiting recording maintenance...")