feat: Add /health endpoint for Docker healthchecks

- Add @mcp.custom_route for /health endpoint using FastMCP
- Returns {status: 'healthy', service: 'graphiti-mcp'}
- Update Dockerfile.standalone healthcheck to use /health instead of /
- Eliminates 404 errors in logs from healthcheck pings
- Follows FastMCP best practices for operational monitoring

mcp_server/docker/Dockerfile.standalone

@@ -71,7 +71,7 @@ EXPOSE 8000
 
 # Health check - verify MCP server is responding
 HEALTHCHECK --interval=10s --timeout=5s --start-period=15s --retries=3 \
-    CMD curl -f http://localhost:8000/ || exit 1
+    CMD curl -f http://localhost:8000/health || exit 1
 
 # Run the MCP server
 CMD ["uv", "run", "main.py"]

mcp_server/src/graphiti_mcp_server.py

@@ -738,6 +738,12 @@ async def get_status() -> StatusResponse:
         )
 
 
+@mcp.custom_route('/health', methods=['GET'])
+async def health_check(request) -> dict:
+    """Health check endpoint for Docker and load balancers."""
+    return {'status': 'healthy', 'service': 'graphiti-mcp'}
+
+
 async def initialize_server() -> ServerConfig:
     """Parse CLI arguments and initialize the Graphiti server configuration."""
     global config, graphiti_service, queue_service, graphiti_client, semaphore