feat: add Railway-ready Jyotish chat product

docs/research/pre_work_error_ledger.md

@@ -64,6 +64,7 @@ For large architecture or release work, also read:
 | ERR-031 | Premium skill zip can ship without user install prompts or replay schemas, leaving users and future oracle imports without a contract. | mitigated 2026-07-09 | `skill_release_package.py` must inject `INSTALL.md` and `USER_PROMPTS.md`; replay contracts must live in `references/real_case_calibration/` and `references/oracle/`. |
 | ERR-032 | Full smoke files can time out while focused slices pass; `test_full_reading_reports_ayanamsa_metadata_and_ai_prompt_pack` currently exposes `external_oracle_gap_summary=null`. | observed 2026-07-10 | Do not claim full `tests/test_cli_smoke.py` or full `tests/test_vedastro_external_technique_evidence.py` passed unless run to completion; use focused slices for related changes and track the prompt-pack gap separately. |
 | ERR-033 | Premium skill zip validation can accidentally depend on a parent Git repository, so a cloud-drive user may fail in a clean unzip directory. | mitigated 2026-07-10 | Release acceptance must include `tests/test_skill_release_clean_trial.py`; scripts such as `public_release_privacy_scan.py` must support non-Git unpacked zip directories. |
+| ERR-034 | On this macOS host, bare `python3` resolves to Python 3.9 without pytest, while the project uses PEP 604 annotations; rerunning with `.venv/bin/python` reaches the tests but `test_preflight_fragment_scan_reports_authority_layers_and_risk_buckets` has a stale `high_value_unpromoted_count >= 1` assertion even when the scanner correctly reports zero. | observed 2026-07-15 | Run the gate with the project venv on this host and do not claim the full pre-work gate passed until the fragment-governance assertion is reconciled with the valid zero-unpromoted state. |
 
 ## Fragment Sweep Command Set