test(cache): 修复CacheConfigTest边界值测试

- 修改 shouldVerifyCacheManager_withMaximumIntegerTtl 为 shouldVerifyCacheManager_withMaximumAllowedTtl
- 使用正确的最大TTL值（10080分钟，7天）而不是 Integer.MAX_VALUE
- 新增 shouldThrowException_whenTtlExceedsMaximum 测试验证边界检查
- 所有1266个测试用例通过
- 覆盖率: 指令81.89%, 行88.48%, 分支51.55%

docs: 添加项目状态报告
- 生成 PROJECT_STATUS_REPORT.md 详细记录项目当前状态
- 包含质量指标、已完成功能、待办事项和技术债务

src/main/java/com/mosquito/project/controller/CallbackController.java

@@ -0,0 +1,40 @@
+package com.mosquito.project.controller;
+
+import com.mosquito.project.dto.RegisterCallbackRequest;
+import com.mosquito.project.persistence.entity.ProcessedCallbackEntity;
+import com.mosquito.project.persistence.repository.ProcessedCallbackRepository;
+import jakarta.validation.Valid;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/v1/callback")
+public class CallbackController {
+
+    private final ProcessedCallbackRepository processedCallbackRepository;
+    private final com.mosquito.project.service.RewardQueue rewardQueue;
+
+    public CallbackController(ProcessedCallbackRepository processedCallbackRepository, com.mosquito.project.service.RewardQueue rewardQueue) {
+        this.processedCallbackRepository = processedCallbackRepository;
+        this.rewardQueue = rewardQueue;
+    }
+
+    @PostMapping("/register")
+    public ResponseEntity<Void> register(@Valid @RequestBody RegisterCallbackRequest request) {
+        String trackingId = request.getTrackingId();
+        if (processedCallbackRepository.existsById(trackingId)) {
+            return ResponseEntity.ok().build();
+        }
+        ProcessedCallbackEntity e = new ProcessedCallbackEntity();
+        e.setTrackingId(trackingId);
+        e.setCreatedAt(java.time.OffsetDateTime.now(java.time.ZoneOffset.UTC));
+        processedCallbackRepository.save(e);
+
+        rewardQueue.enqueueReward(trackingId, request.getExternalUserId(), null);
+        return ResponseEntity.ok().build();
+    }
+}
+