Audit the repository for database-first, minimal external data retrieval

Objective

Audit the repository for database-first, minimal external data retrieval.

Notes: Audited active and legacy outbound paths; made OHLCV/Yahoo and FRED coverage misses request only the missing tail while merging prior sqlite/cache history; documented unavoidable source-specific and operational paths; added focused tests.

Approach

Reuses existing report research/findings/database-first-retrieval-t218.md — tables/metrics preserved verbatim via source_report pointer. Body below summarizes grounded evidence from that report and adjacent artifacts.

Files / code / data changed

• No commit SHA confidently associated with t218 in sampled log [reconstructed — uncertain].
• Source report: research/findings/database-first-retrieval-t218.md
• Task-history entry: research/findings/task-history.json#t218

Results

Conclusions and metrics are in research/findings/database-first-retrieval-t218.md; see detail page for preserved tables/metrics.

Conclusions

[reconstructed — uncertain] Outcome inferred from status done and task note.

Problems / follow-ups

• See source report or PR discussion for follow-ups. No unsupported follow-ups fabricated.

Links

• Task-history: research/findings/task-history.json id t218
• Findings: research/findings/database-first-retrieval-t218.md