Update Docker configuration, enhance error handling, and improve logging

- Added health check to the camera management API service in docker-compose.yml for better container reliability.
- Updated installation scripts in Dockerfile to check for existing dependencies before installation, improving efficiency.
- Enhanced error handling in the USDAVisionSystem class to allow partial operation if some components fail to start, preventing immediate shutdown.
- Improved logging throughout the application, including more detailed error messages and critical error handling in the main loop.
- Refactored WebSocketManager and CameraMonitor classes to use debug logging for connection events, reducing log noise.

docker-compose.yml

@@ -6,6 +6,12 @@ services:
       dockerfile: Dockerfile
     working_dir: /app
     restart: unless-stopped  # Automatically restart container if it fails or exits
+    healthcheck:
+      test: ["CMD-SHELL", "python3 -c 'import urllib.request; urllib.request.urlopen(\"http://localhost:8000/health\").read()' || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 60s
     volumes:
       - ./camera-management-api:/app
       - /mnt/nfs_share:/mnt/nfs_share
@@ -20,29 +26,42 @@ services:
       - MEDIAMTX_RTSP_PORT=8554
     command: >
       sh -lc "
-        apt-get update && apt-get install -y libusb-1.0-0-dev ffmpeg;
+        set -e  # Exit on error
+        
+        # Only install system packages if not already installed (check for ffmpeg)
+        if ! command -v ffmpeg &> /dev/null; then
+          echo 'Installing system dependencies...';
+          apt-get update && apt-get install -y --no-install-recommends libusb-1.0-0-dev ffmpeg;
+        else
+          echo 'System dependencies already installed';
+        fi
 
         # Install camera SDK if not already installed
         if [ ! -f /lib/libMVSDK.so ] && [ -f 'camera_sdk/linuxSDK_V2.1.0.49(250108)/install.sh' ]; then
           echo 'Installing camera SDK...';
           cd 'camera_sdk/linuxSDK_V2.1.0.49(250108)';
           chmod +x install.sh;
-          ./install.sh;
+          ./install.sh || echo 'Warning: Camera SDK installation may have failed';
           cd /app;
-          echo 'Camera SDK installed successfully';
         else
           echo 'Camera SDK already installed or install script not found';
         fi;
 
-        # Install Python dependencies
+        # Install Python dependencies (only if requirements.txt changed or packages missing)
         if [ -f requirements.txt ]; then
-          pip install --no-cache-dir -r requirements.txt;
+          pip install --no-cache-dir -r requirements.txt || echo 'Warning: Some Python packages may have failed to install';
         else
-          pip install --no-cache-dir -e .;
+          pip install --no-cache-dir -e . || echo 'Warning: Package installation may have failed';
         fi;
 
-        # Start the application
-        python main.py --config config.compose.json
+        # Start the application with error handling
+        echo 'Starting USDA Vision Camera System...';
+        python main.py --config config.compose.json || {
+          echo 'Application exited with error code: $?';
+          echo 'Waiting 5 seconds before exit...';
+          sleep 5;
+          exit 1;
+        }
       "
     network_mode: host