Thin parser over the existing api_keys lookup. Strips the Bearer
prefix, validates the token via services/api_keys.lookup_key (which
already filters revoked keys and updates last_used_at), and returns
the user_id for the in-flight MCP request.
Tests follow the existing mock-async_session pattern in
test_api_keys.py rather than introducing a real DB fixture.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Empty FastMCP instance with the post-pivot instructions block. Tools
get registered in phases 2 and 3; ASGI mounting + bearer-auth comes
in task 1.4.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>