YueGuobin 55b3a7d622
feat: implement standard MCP protocol with SSE transport
- Use FastMCP (Anthropic MCP SDK) for tool registration and SSE transport
- Mount SSE app under /v3/mcp/transport with JWT token authentication
- Token passed via ?token=<jwt> query parameter on SSE connection
- Token validated against GNS3 auth_service and stored in contextvars
- Tool handlers create Gns3Connector with JWT token to call GNS3 REST API
- 7 project tools: list_projects, get_project, create_project, delete_project,
  open_project, close_project, get_project_stats
- Unauthenticated SSE connections return 401
2026-06-04 22:19:43 +08:00
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