Critical bug fix: close_pr now checks forgejo_api return value and
skips DB update on Forgejo failure, preventing ghost PRs (DB closed,
Forgejo open). Returns bool so callers can handle failures.
_terminate_pr checks return value — skips source requeue on failure.
stale_pr.py migrated from raw Forgejo+DB to close_pr (last raw close
transition eliminated).
eval_parse.py: 15 pure parsing functions extracted from evaluate.py
(~370 lines removed). Zero I/O, zero async, independently testable.
evaluate.py drops from ~1510 to ~1140 lines.
Tests: 295 passed (42 new eval_parse + 2 new close_pr), zero regressions.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
