Session 7b: Fix pipeline - body parser, Redis queueing, poller visibility, auto-start

src/utils/redis.js

@@ -11,10 +11,13 @@ let degraded = false;
 function getRedisClient() {
   if (!client) {
     client = new Redis(process.env.REDIS_URL || 'redis://127.0.0.1:6379', {
-      // Don't block the app starting up if Redis is down at boot. Failed
-      // commands fall through to the cache-miss path immediately.
+      // Eager connect — but allow commands to QUEUE while the TCP/auth
+      // handshake completes. Without offline queueing, pollers booting
+      // alongside the API throw "Stream isn't writeable" before Redis
+      // is ready. With queueing, ioredis flushes the backlog the moment
+      // the connection enters READY state.
       lazyConnect: false,
-      enableOfflineQueue: false,
+      enableOfflineQueue: true,
       maxRetriesPerRequest: 1,
       retryStrategy(times) {
         // Exponential backoff up to 30s. ioredis keeps trying forever on its
@@ -30,7 +33,11 @@ function getRedisClient() {
       }
     });
     client.on('ready', () => {
+      // Surface the ready transition in PM2/container logs so operators
+      // can confirm the connection actually established. Distinct from
+      // reconnect-after-outage which the line below logs at info.
       if (degraded) console.info('[redis] reconnected, leaving degraded mode');
+      else console.log('[redis] connected and ready');
       degraded = false;
     });
   }