jedarden
67b3fde4d6
feat(pdftract-j6yd): implement signatures array output + validation_status enum + schema integration
Add document-level /signatures array output per Phase 7.3 of the plan.
Changes:
- Add SignatureJson struct to schema module with all signature metadata fields
- Update ExtractionResult to include signatures: Vec<SignatureJson>
- Integrate signature extraction into extract_pdf() pipeline
- Update result_to_json() to include signatures in JSON output
- Update JSON schema with signatures array and SignatureJson definition
- Add markdown sink signatures footer when signatures are present
- Add comprehensive tests for signature JSON serialization and validation
Acceptance criteria:
- Schema tests: 5/5 signature JSON tests pass
- Markdown sink emits Signatures footer when count > 0
- PyO3 binding automatically handles Vec<SignatureJson> via serde
- docs/schema/v1.0/pdftract.schema.json updated with signatures shape
Verification note: notes/pdftract-j6yd.md
Closes: pdftract-j6yd