全局审计完成

internal/application/auditarchive/retention.go

@@ -41,6 +41,7 @@ type RetentionResult struct {
 	EventCount       int64
 	ResourceCount    int64
 	IntegrationCount int64
+	EstimatedBatches int64
 	ManifestKeys     []string
 	Duration         time.Duration
 }
@@ -56,6 +57,36 @@ func (s *Service) CleanupPreviousMonth(ctx context.Context) (RetentionResult, er
 	return s.CleanupMonth(ctx, now.AddDate(0, -1, 0))
 }
 
+// ValidatePreviousMonth 只读校验上一个完整自然月的归档与清理门禁。
+func (s *Service) ValidatePreviousMonth(ctx context.Context) (RetentionResult, error) {
+	now := time.Now().In(s.location)
+	return s.ValidateMonth(ctx, now.AddDate(0, -1, 0))
+}
+
+// ValidateMonth 只读校验指定完整自然月，不写清理断点且不删除在线数据。
+func (s *Service) ValidateMonth(ctx context.Context, month time.Time) (result RetentionResult, err error) {
+	if s.db == nil || s.store == nil {
+		return result, fmt.Errorf("日志留存演练数据库或对象存储未配置")
+	}
+	start, end, err := s.retentionMonthRange(month)
+	if err != nil {
+		return result, err
+	}
+	startedAt := time.Now()
+	result.Month = start.Format("2006-01")
+	runs, err := s.loadRetentionRuns(ctx, start, end)
+	if err != nil {
+		return result, err
+	}
+	if err := s.validateRetentionRuns(ctx, start, end, runs); err != nil {
+		return result, err
+	}
+	summarizeRetentionRuns(runs, &result)
+	result.EstimatedBatches = estimatedRetentionBatches(result)
+	result.Duration = time.Since(startedAt)
+	return result, nil
+}
+
 // CleanupMonth 校验归档硬门禁后按固定顺序物理清理指定完整自然月。
 func (s *Service) CleanupMonth(ctx context.Context, month time.Time) (result RetentionResult, cleanupErr error) {
 	if s.db == nil || s.store == nil || s.audit == nil {
@@ -402,6 +433,13 @@ func summarizeRetentionRuns(runs retentionRuns, result *RetentionResult) {
 	}
 }
 
+func estimatedRetentionBatches(result RetentionResult) int64 {
+	batchSize := int64(constants.AuditRetentionDeleteBatchSize)
+	return (result.EventCount+batchSize-1)/batchSize +
+		(result.ResourceCount+batchSize-1)/batchSize +
+		(result.IntegrationCount+batchSize-1)/batchSize
+}
+
 func (s *Service) cleanupAuditMonth(ctx context.Context, start, end time.Time, runs []*model.LogArchiveRun) error {
 	if allRunsCleaned(runs) {
 		return nil