rsync of obra/drill@013fcb8b7d into superpowers/evals/, excluding
.git/, .venv/, results/, .env/, __pycache__/, *.egg-info/,
.private-journal/.
The drill repo is unaffected by this commit; archival is a separate
manual step after this PR merges.
Source SHA recorded at evals/.drill-source-sha for divergence
detection.
