fix: 修复人参果agent主动消息循环+创建人参果1号

- renshenguo_ws_handler: 注入7条行为约束规则，禁止agent在无用户输入时主动发消息
- renshenguo2_ws_handler: 新增人参果1号 WS handler（行为约束版）
- renshenguo2_app_service: 新增人参果1号飞书消息服务
- config.py/main.py: 注册RENSHENGUO2配置和长连接启动

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

backend/app/main.py

@@ -255,6 +255,13 @@ async def startup_event():
     except Exception as e:
         logger.error(f"人参果长连接启动失败: {e}")
 
+    # 启动人参果1号飞书长连接（AI学习助手 — 行为约束版，禁止主动消息）
+    try:
+        from app.services.renshenguo2_ws_handler import start_ws_client as start_renshenguo2_ws
+        asyncio.ensure_future(start_renshenguo2_ws())
+    except Exception as e:
+        logger.error(f"人参果1号长连接启动失败: {e}")
+
 # 注册路由
 from app.api import auth, uploads, workflows, executions, websocket, execution_logs, data_sources, agents, platform_templates, model_configs, webhooks, template_market, batch_operations, collaboration, permissions, monitoring, alert_rules, node_test, node_templates, tools, agent_chat, agent_monitoring, knowledge_base, agent_schedules, notifications, feishu_bind, approval