quantmodel — Investigate resilient workarounds for FRED HTTP 503 errors

Objective

Investigate resilient workarounds for FRED HTTP 503 errors.

Notes: Identified bare User-Agent CDN rejection; descriptive project-contact agent restores HTTP 200. Added Retry-After, jitter, no-final-sleep behavior and focused tests; live INDPRO fetch succeeded.

Approach

Reuses existing report research/findings/fred-http-resilience-t215.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 t215 in sampled log [reconstructed — uncertain].
Source report: research/findings/fred-http-resilience-t215.md
Task-history entry: research/findings/task-history.json#t215

Results

Conclusions and metrics are in research/findings/fred-http-resilience-t215.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.