chore: add STUCK_TIMEOUT_MS to test worker in docker-compose.yml

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -87,6 +87,7 @@ services:
       POLL_INTERVAL_MS: ${POLL_INTERVAL_MS:-2000}
       WORKER_CONCURRENCY: ${WORKER_CONCURRENCY:-4}
       ENCODER: ${ENCODER:-libx264}
+      STUCK_TIMEOUT_MS: ${STUCK_TIMEOUT_MS:-300000}
     depends_on:
       postgres:
         condition: service_healthy