Add GPU status to health check endpoint for monitoring GPU availability

api_server.py

@@ -425,7 +425,17 @@ async def list_result_videos():
 
 @app.get("/api/health")
 async def api_health():
-    return {"status": "ok", "time": datetime.utcnow().isoformat()}
+    """Health check endpoint with GPU status"""
+    import onnxruntime
+    available_providers = onnxruntime.get_available_providers()
+    gpu_available = 'CUDAExecutionProvider' in available_providers
+    
+    return {
+        "status": "ok",
+        "time": datetime.utcnow().isoformat(),
+        "gpu_available": gpu_available,
+        "execution_providers": available_providers
+    }
 
 @app.get("/")
 async def root():