Change video storage directory from /storage to /mnt/nfs_share

- Update StorageConfig default base_path in core/config.py
- Update base_path and camera storage_paths in config.json and config.compose.json
- Update Docker Compose volume mounts to use /mnt/nfs_share
- Update start_system.sh to create /mnt/nfs_share directory
- Update convert_avi_to_mp4.sh to use new NFS path
- Update all documentation files to reflect new storage paths
- Videos now stored on NFS server at 192.168.1.249:/mnt/nfs_share/

camera-management-api/config.compose.json

@@ -10,7 +10,7 @@
     }
   },
   "storage": {
-    "base_path": "/storage",
+    "base_path": "/mnt/nfs_share",
     "max_file_size_mb": 1000,
     "max_recording_duration_minutes": 60,
     "cleanup_older_than_days": 30
@@ -29,7 +29,7 @@
     {
       "name": "camera1",
       "machine_topic": "blower_separator",
-      "storage_path": "/storage/camera1",
+      "storage_path": "/mnt/nfs_share/camera1",
       "exposure_ms": 0.3,
       "gain": 4.0,
       "target_fps": 0,
@@ -60,7 +60,7 @@
     {
       "name": "camera2",
       "machine_topic": "vibratory_conveyor",
-      "storage_path": "/storage/camera2",
+      "storage_path": "/mnt/nfs_share/camera2",
       "exposure_ms": 0.2,
       "gain": 2.0,
       "target_fps": 0,