Remove unused $user variables, add cron container for dev

- Remove 11 unused $user assignments from requireEventOwnership calls
- Add cron container to docker-compose-dev.yml with scheduled tasks:
  expire-pending orders (5min), messenger monitor (hourly),
  meilisearch consistency (daily 3am)
- Cron logs show registered tasks at startup and timestamps per execution

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose-dev.yml

@@ -151,6 +151,20 @@ services:
       retries: 10
       start_period: 120s
 
+  cron:
+    build:
+      context: ./docker/cron
+      dockerfile: Dockerfile
+    container_name: e_ticket_cron
+    restart: unless-stopped
+    volumes:
+      - .:/app
+    depends_on:
+      database:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+
   redisinsight:
     image: redis/redisinsight:latest
     container_name: e_ticket_redisinsight