fix hanging manual snapshot task

internal/tasks/dailyAggregate.go

@@ -129,6 +129,13 @@ func (c *CronTask) aggregateDailySummary(ctx context.Context, targetTime time.Ti
 		c.Logger.Error("failed to aggregate daily inventory", "error", err, "date", dayStart.Format("2006-01-02"))
 		return err
 	}
+	// Backfill missing creation times to the start of the day for rows where vCenter had no creation info.
+	if _, err := dbConn.ExecContext(ctx,
+		`UPDATE `+summaryTable+` SET "CreationTime" = $1 WHERE "CreationTime" IS NULL OR "CreationTime" = 0`,
+		dayStart.Unix(),
+	); err != nil {
+		c.Logger.Warn("failed to normalize creation times for daily summary", "error", err, "table", summaryTable)
+	}
 	if err := db.RefineCreationDeletionFromUnion(ctx, dbConn, summaryTable, unionQuery); err != nil {
 		c.Logger.Warn("failed to refine creation/deletion times", "error", err, "table", summaryTable)
 	}