feat(fable-mcp): implement FableClient, all tool modules, and server.py
- client.py: async httpx wrapper, FableAPIError, stream_get() SSE generator,
singleton init_client()/get_client() and _reset_client() for tests
- tools/: notes, tasks, projects, milestones, search, chat — thin async
functions that accept FableClient and call Fable REST endpoints
- server.py: FastMCP entry point with 20 tools registered via @mcp.tool(),
each opening a fresh FableClient context per call; validates env vars at startup
- tests: 34 tests covering client HTTP behaviour, error handling, singleton,
SSE streaming, and all tool modules
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
bvandeusen
359cb24d9a