After #5600 merged tasks/websocket into the Next.js process,
`createRedisConnection()` returns `null` because `CI=true` is baked into
the bundle at build time. This causes `TypeError: Cannot read properties
of null` on every `.publish()` / `.get()` call during cron job startup.
- Remove the CI/DISABLE_REDIS_LOGS null guard from createRedisConnection
- Lazy-init all Redis clients to avoid build-time evaluation
- Add a Redis readiness retry loop before starting cron jobs
Thomas Camlong
a6ec5f789d