Operational rule: cache, queue, search, and rate-limiting all use Postgres
— no Redis or external systems.
New Task 9b adds:
- pg_trgm extension + GIN trigram indexes on whatsapp_groups.name and
reminders.name for fuzzy search
- BRIN indexes on reminder_runs.fired_at and audit_log.created_at for
cheap time-series scans
- Common-filter B-tree indexes on reminders.status and (account_id,
scheduled_at)
- cache_entries table + cacheGet / cacheSet / cacheGetOrSet helpers
- rate_limit_buckets table + checkRateLimit (atomic UPSERT, sliding window)
- search.ts with trigramMatch / trigramRank Drizzle SQL fragments
- Vitest unit tests for cache and rate-limit helpers
Also rewrites Task 12 (rate-limit middleware) to enforce limits inside
Server Actions where DB access exists, rather than edge middleware where
it doesn't.
yiekheng
24e61f4cdd