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Make daily dashboard refresh recover from delayed price feeds - #38
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Context
The October 14 snapshot initially failed because all 20 ticker histories stopped at October 12 while the job required October 13; a later rerun succeeded. The strict readiness gate correctly prevented stale or incomplete data from publishing.
Recovery design
Preserve the 12:17 UTC daily refresh; add two bounded independent recovery windows at 15:17 and 18:17 UTC, each prices only.
Preflight checks the committed previous snapshot using the NYSE session and 60-row evidence criteria. If current, skip recovery without fetching or deploying.
Export price data only for tickers missing required coverage, with in-process retries narrowed further to failed tickers. Preserve last validated public snapshots on any failure.
Report missing tickers and categorized provider errors (session lag, timeout, access/rate-limit, other) in the GitHub Actions summary. Emit an Actions error annotation when the final scheduled retry remains blocked.
Public UI identifies published rather than continuously live data; after 96 hours mark the retained snapshot stale and flag Data Status attention.
Verification
New preflight tests, targeted price retry tests, provider diagnostics tests, workflow cron/DST contract tests, UI stale-snapshot regression tests. PR CI runs workflow, API and frontend tests.
Limits
Delayed GitHub schedules or persistent outages after the final retry still leave last-known-good dated data; alerts use GitHub Actions and repository notification settings.