## Summary
- **Per-league queue**: replaced the single global notification queue with a \`Map<leagueId, queue>\` so concurrent drafts in different leagues drain independently and don't block each other
- **Deadlock fix**: wrapped the drainer loop in \`try/finally\` so \`drainingLeagues\` is always cleaned up even if a task throws unexpectedly — previously a crash would leave the flag set permanently, silently dropping all future notifications for that league
- **Wait cap fix**: moved \`Math.min\` to wrap \`(retryAfter * (attempt+1))\` so the 10s ceiling applies to the final product, not just the base value — settings actions that directly await webhook calls were previously blockable for up to 30s on a rate-limited third attempt
## Root cause of the original problem
During an autodraft chain, \`notifyPickMadeOnDiscord\` was called fire-and-forget for each pick in the chain, causing all webhook requests to fly concurrently. Discord's per-webhook rate limit (~5 req/2s) rejected most of them; the single retry logic fired for all simultaneously, hit the limit again, and the \`.catch()\` swallowed the errors silently.
## Test plan
- [ ] Enable autodraft for 5+ consecutive teams; trigger the chain; confirm all picks announce in Discord in order
- [ ] Confirm a slow/rate-limited webhook in League A does not delay League B's announcements
- [ ] \`npm run test:run\` — 158 test files, 2336 tests, all pass
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Chris Parsons <chrisparsons1127@gmail.com>
Reviewed-on: #57
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