fix(ops): 修复告警状态验证和错误处理逻辑

- 增强告警事件状态验证，添加合法状态值检查
- 移除重试逻辑中的遗留字段赋值
- 修正仓库不可用时的错误类型
- 格式化测试文件代码

backend/internal/repository/ops_repo.go

@@ -925,9 +925,13 @@ func buildOpsErrorLogsWhere(filter *service.OpsErrorLogFilter) (string, []any) {
 	// ops_error_logs stores client-visible error requests (status>=400),
 	// but we also persist "recovered" upstream errors (status<400) for upstream health visibility.
 	// By default, keep list endpoints scoped to unresolved records if the caller didn't specify.
-	if filter != nil && filter.Resolved == nil {
+	resolvedFilter := (*bool)(nil)
+	if filter != nil {
+		resolvedFilter = filter.Resolved
+	}
+	if resolvedFilter == nil {
 		f := false
-		filter.Resolved = &f
+		resolvedFilter = &f
 	}
 	// Keep list endpoints scoped to client errors unless explicitly filtering upstream phase.
 	if phaseFilter != "upstream" {
@@ -967,8 +971,8 @@ func buildOpsErrorLogsWhere(filter *service.OpsErrorLogFilter) (string, []any) {
 		args = append(args, source)
 		clauses = append(clauses, "LOWER(COALESCE(error_source,'')) = $"+itoa(len(args)))
 	}
-	if filter.Resolved != nil {
-		args = append(args, *filter.Resolved)
+	if resolvedFilter != nil {
+		args = append(args, *resolvedFilter)
 		clauses = append(clauses, "COALESCE(resolved,false) = $"+itoa(len(args)))
 	}
 	if len(filter.StatusCodes) > 0 {

backend/internal/repository/scheduler_snapshot_outbox_integration_test.go

@@ -27,7 +27,7 @@ func TestSchedulerSnapshotOutboxReplay(t *testing.T) {
 		RunMode: config.RunModeStandard,
 		Gateway: config.GatewayConfig{
 			Scheduling: config.GatewaySchedulingConfig{
-				OutboxPollIntervalSeconds: 1,
+				OutboxPollIntervalSeconds:  1,
 				FullRebuildIntervalSeconds: 0,
 				DbFallbackEnabled:          true,
 			},

backend/internal/repository/usage_log_repo_integration_test.go

@@ -416,8 +416,8 @@ func (s *UsageLogRepoSuite) TestDashboardAggregationConsistency() {
 	// 使用固定的时间偏移确保 hour1 和 hour2 在同一天且都在过去
 	// 选择当天 02:00 和 03:00 作为测试时间点（基于 now 的日期）
 	dayStart := truncateToDayUTC(now)
-	hour1 := dayStart.Add(2 * time.Hour)  // 当天 02:00
-	hour2 := dayStart.Add(3 * time.Hour)  // 当天 03:00
+	hour1 := dayStart.Add(2 * time.Hour) // 当天 02:00
+	hour2 := dayStart.Add(3 * time.Hour) // 当天 03:00
 	// 如果当前时间早于 hour2，则使用昨天的时间
 	if now.Before(hour2.Add(time.Hour)) {
 		dayStart = dayStart.Add(-24 * time.Hour)