Implement silent background cleanup of notes that have been in trash
for more than 30 days, fulfilling the promise already shown in the
Trash view UI.
Safety model (all 5 checks must pass per file):
- _trashed: true in frontmatter
- _trashed_at present and parseable as date
- Date strictly >30 days ago
- File exists on disk
- File path inside vault root
Uses trash::delete (OS trash) with fs::remove_file fallback.
Triggers on app launch and window focus (max once/hour).
Audit log at .laputa/purge.log. Dry-run mode for testing.
Also fixes pre-commit hook to read CodeScene thresholds from
.codescene-thresholds instead of hardcoded values, matching the
ratchet mechanism documented in CLAUDE.md.
ADR-0042 documents the safety model.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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