refactor(ops): 优化任务心跳和组件刷新机制

后端改动:
- 添加 ops_job_heartbeats.last_result 字段记录任务执行结果
- 优化告警评估器统计信息(规则数/事件数/邮件数)
- 统一各定时任务的心跳记录格式

前端改动:
- 重构 OpsConcurrencyCard 使用父组件统一控制刷新节奏
- 移除独立的 5 秒刷新定时器,改用 refreshToken 机制
- 修复 TypeScript 类型错误

backend/internal/service/ops_aggregation_service.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"errors"
+	"fmt"
 	"log"
 	"strings"
 	"sync"
@@ -235,11 +236,13 @@ func (s *OpsAggregationService) aggregateHourly() {
 	successAt := finishedAt
 	hbCtx, hbCancel := context.WithTimeout(context.Background(), 2*time.Second)
 	defer hbCancel()
+	result := truncateString(fmt.Sprintf("window=%s..%s", start.Format(time.RFC3339), end.Format(time.RFC3339)), 2048)
 	_ = s.opsRepo.UpsertJobHeartbeat(hbCtx, &OpsUpsertJobHeartbeatInput{
 		JobName:        opsAggHourlyJobName,
 		LastRunAt:      &runAt,
 		LastSuccessAt:  &successAt,
 		LastDurationMs: &dur,
+		LastResult:     &result,
 	})
 }
 
@@ -331,11 +334,13 @@ func (s *OpsAggregationService) aggregateDaily() {
 	successAt := finishedAt
 	hbCtx, hbCancel := context.WithTimeout(context.Background(), 2*time.Second)
 	defer hbCancel()
+	result := truncateString(fmt.Sprintf("window=%s..%s", start.Format(time.RFC3339), end.Format(time.RFC3339)), 2048)
 	_ = s.opsRepo.UpsertJobHeartbeat(hbCtx, &OpsUpsertJobHeartbeatInput{
 		JobName:        opsAggDailyJobName,
 		LastRunAt:      &runAt,
 		LastSuccessAt:  &successAt,
 		LastDurationMs: &dur,
+		LastResult:     &result,
 	})
 }