feat(push-notifications): 新增挑战提醒定时推送功能

新增每日定时推送系统，根据用户参与状态发送不同类型的挑战提醒：
- 已参与用户：每日发送鼓励推送
- 未参与用户：隔天发送挑战邀请
- 匿名用户：隔天发送通用邀请

包含推送历史记录表、定时任务调度、多类型文案模板和防重复发送机制

package.json

@@ -32,6 +32,7 @@
     "@nestjs/core": "^11.0.1",
     "@nestjs/jwt": "^11.0.0",
     "@nestjs/platform-express": "^11.0.1",
+    "@nestjs/schedule": "^6.0.1",
     "@nestjs/sequelize": "^11.0.0",
     "@nestjs/swagger": "^11.1.0",
     "@parse/node-apn": "^5.0.0",