feat: MCP server at /mcp — AI agents read server state from the panel ...

Streamable HTTP, stateless, JSON responses (proxy-friendly). Tools:
panel_overview (fleet summary), server_details (full current state),
server_history (downsampled metrics history). ASGI endpoint registered
directly on FastAPI routes (Mount misses exact /mcp) and the MCP session
manager runs in the app lifespan. mcp SDK pinned >=1.10,<2. README:
tool table, claude mcp add example, token caveat.

Co-Authored-By: Claude Code <noreply@anthropic.com>