harwinder bf9609708c Fix duplicate-index crash in data validation, add Telegram flood control
- Move index dedup before OHLC consistency fix in _validate_and_clean
  to prevent crash when df.loc[dup_idx] returns Series instead of scalar
- Add global flood backoff: detect RetryAfter, pause all sends/edits
  until ban expires instead of retrying and escalating the ban
- Stop dashboard edit-fail → new-message spam cascade: track consecutive
  failures, only resend after 3 failed edits
- Increase dashboard refresh from 5s to 30s, min send interval to 1.5s
- Add comprehensive QA test suite (140 tests across all 7 modules)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-05-14 13:04:28 -04:00
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