fix: update coordinator-api module path and add ML dependencies

Coordinator API Module Path Update - Complete:
✅ SERVICE FILE UPDATED: Changed uvicorn module path to app.main
- systemd/aitbc-coordinator-api.service: Updated from `main:app` to `app.main:app`
- WorkingDirectory: Changed from src/app to src for proper module resolution
- Reason: Correct Python module path for coordinator API service

✅ PYTHON PATH CONFIGURATION:
🔧 sys.path Security: Added crypto and sdk paths to locked paths

systemd/aitbc-explorer.service

@@ -11,8 +11,8 @@ Environment=PATH=/usr/bin:/usr/local/bin:/usr/bin:/bin
 ExecStart=/opt/aitbc/venv/bin/python main.py
 Restart=always
 RestartSec=5
-StandardOutput=syslog
-StandardError=syslog
+StandardOutput=journal
+StandardError=journal
 SyslogIdentifier=aitbc-explorer
 
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