block approximate gulika reuse

docs/research/pre_work_error_ledger.md

@@ -81,6 +81,7 @@ For large architecture or release work, also read:
 | ERR-048 | Candidate-time scanner assumed all documented D4/D24/D30 divisions were exposed by `jyotish_engine.py varga`; actual `--d4` failed at runtime. | mitigated 2026-07-12 | Candidate scans must record unsupported Varga flags as `unavailable_vargas`; only successfully computed D1/D9/D10 fields may drive local sensitivity output until a unified Varga contract exists. |
 | ERR-049 | PyJHora benchmark runner executed on `--help`, used a wrong repository-root path in `run_skill_baseline.py`, and failed when reused without pre-created output directories. | mitigated 2026-07-12 | Keep `tests/test_pyjhora_compare_cli.py`; require explicit `--build-local`, safe argparse help, correct repo root, and directory creation inside `run_sample()`. |
 | ERR-050 | Prashna CLI/API/UI could synthesize or accept a non-question chart; legacy Tajika/Saham/Sphuta/Kunda paths also exposed approximate values as usable evidence. | mitigated 2026-07-12 | Require backend Swiss `PrashnaContext` with question text/time/location/timezone; reject client planets/ascendant. Block legacy Sphuta/Kunda/Gulika/Panchavargiya and no-location Saham paths; keep seven-planet Tajika interactions partial until named-yoga golden cases and formula parity exist. |
+| ERR-051 | Privacy redaction can replace executable numeric test fixtures with bare placeholder identifiers such as `REDACTED_YEAR`, causing `NameError` before a regression reaches its target. | observed 2026-07-12 | Public tests must use generic fixtures (for example 1990) or quoted placeholders only; run `rg -n "REDACTED_YEAR" tests` before release and repair executable occurrences. |
 
 ## Fragment Sweep Command Set