- Reject duplicate uploads at the API boundary (HTTP 409) instead of
silently skipping in the background worker. Checks both ingested
documents and in-flight jobs via content_hash on the jobs table.
- Go client handles 409 with distinct messages for already-imported
documents vs already-queued jobs.
- Sanitize FTS5 search queries by quoting each token to prevent syntax
errors from special characters like ?, *, ", (), AND, OR, NOT.
- Add try/except safety net around FTS5 execute for edge cases.
- Add main branch guard to release.sh to prevent releasing from
feature branches.
- Update specs and README to reflect new behaviour.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>