Phase 3 of the production launch plan: task reliability improvements
to prevent DB lock issues at scale and handle transient wallet API
failures gracefully.
- 3.1 Batched point expiration: rewrite per-card Python loop to chunked
processing (LIMIT 500 FOR UPDATE SKIP LOCKED). Each chunk commits
independently, releasing row locks before processing the next batch.
Notifications sent after commit (outside lock window). Warning emails
also chunked with same pattern.
- 3.2 Wallet sync exponential backoff: replace time.sleep(2) single
retry with 4 attempts using [1s, 4s, 16s] backoff delays. Per-card
try/except ensures one failing card doesn't block the batch.
Failed card IDs logged for observability.
342 tests pass.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Samir Boulahtit
fde58bea06