Fix lint issues in pet detection integration

- Import PetsConfig directly instead of forward ref string
- Fix import sorting in worker.py, queries.py, constants.py
- Remove unused imports in profiles.py, trainer.py, processor.py

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

vigilar/camera/worker.py

@@ -13,18 +13,17 @@ import signal
 import time
 
 import cv2
-import numpy as np
 
 from vigilar.bus import MessageBus
 from vigilar.camera.hls import HLSStreamer, RemoteHLSStreamer
 from vigilar.camera.motion import MotionDetector
 from vigilar.camera.recorder import AdaptiveRecorder
 from vigilar.camera.ring_buffer import RingBuffer
-from vigilar.config import CameraConfig, MQTTConfig, RemoteConfig
+from vigilar.config import CameraConfig, MQTTConfig, PetsConfig, RemoteConfig
 from vigilar.constants import Topics
-from vigilar.detection.yolo import YOLODetector
 from vigilar.detection.pet_id import PetIDClassifier
 from vigilar.detection.wildlife import classify_wildlife_threat
+from vigilar.detection.yolo import YOLODetector
 
 log = logging.getLogger(__name__)
 
@@ -49,7 +48,7 @@ def run_camera_worker(
     recordings_dir: str,
     hls_dir: str,
     remote_cfg: RemoteConfig | None = None,
-    pets_cfg: "PetsConfig | None" = None,
+    pets_cfg: PetsConfig | None = None,
 ) -> None:
     """Main entry point for a camera worker process."""
     camera_id = camera_cfg.id