Add /jobs endpoint to monitor routers and improve service status handling in dashboard

- Add /jobs endpoint to both agent-coordinator and coordinator-api monitor routers
- Add get_jobs function returning empty list for history and metrics commands
- Update dashboard command to handle both string and dict formats for service status
- Initialize campaigns file when empty in addition to when missing

apps/coordinator-api/src/app/routers/monitor.py

@@ -46,3 +46,9 @@ async def get_miners():
 async def get_history_dashboard():
     """Get historical dashboard data."""
     return []
+
+
+@router.get("/jobs", response_model=List[Dict])
+async def get_jobs():
+    """Get jobs list for history and metrics commands."""
+    return []