feat: migrate from face detection to HOG person detection

zone_tracker.py

@@ -10,7 +10,7 @@ from collections import defaultdict
 
 class ZoneTracker:
     def __init__(self, frame_width, entry_zone_percent=0.4, exit_zone_percent=0.4, 
-                 cooldown_seconds=2.0, center_buffer_percent=0.1):
+                 cooldown_seconds=4.0, center_buffer_percent=0.1):
         """
         Initialize the zone tracker.
         
@@ -97,8 +97,8 @@ class ZoneTracker:
         Returns:
             face_id if matched, None if new face
         """
-        max_distance = 100  # Maximum pixel distance to consider it the same face
-        max_size_diff = 50  # Maximum size difference to consider it the same face
+        max_distance = 150  # Maximum pixel distance to consider it the same face
+        max_size_diff = 100  # Maximum size difference to consider it the same face
         
         for face_id, face_data in self.tracked_faces.items():
             # Skip if face hasn't been seen recently (within last 2 seconds)