优化推送任务

.env.example

@@ -5,6 +5,16 @@ DATABASE_URL=postgresql+asyncpg://user:password@localhost:5432/ai_talk_callback_
 CELERY_BROKER_URL=redis://localhost:6379/0
 CELERY_RESULT_BACKEND=redis://localhost:6379/0
 
+# Redis配置 (扩展配置，如果需要覆盖默认值)
+REDIS_PASSWORD=
+REDIS_MAX_CONNECTIONS=20
+REDIS_TIMEOUT=5
+
+# Redis分布式锁配置
+REDIS_LOCK_TIMEOUT=300
+REDIS_LOCK_MAX_RETRIES=10
+REDIS_LOCK_RETRY_DELAY=0.5
+
 # 业务配置
 COUNT_THRESHOLD=3
 EXTERNAL_API_ENABLED=false