The old `weekday() >= 5` check blocked all of Sunday, but the forex
market reopens Sunday 22:00 UTC (Sydney open). Now uses proper time-based
check so the bot fetches data and generates signals on Sunday evening.
- 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)
harwinder