Task 6.1.
- provenance.py: classify a checkout as human / agent / mixed / unknown
from deterministic signals only (.claude/, AGENTS.md, Lovable meta,
agent git trailers on a bounded commit sample); no model involved.
- cli scan runs a `provenance` stage; the manifest records the result.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01T7XD7x5KonMdmGRkp63EQG
