[Fix](JournalEntity) re-add a line of code that is accidentally remov…

…ed in #19917 (#36423)

## Proposed changes

`isRead = true;` is accidentally removed in #19917 for
`OperationType.OP_DELETE_ANALYSIS_TASK`



![bug](https://github.com/apache/doris/assets/68336428/acbcde92-9a64-4c3e-8ae9-86b1a45dfb7f)

fe/fe-core/src/main/java/org/apache/doris/journal/JournalEntity.java

@@ -862,6 +862,7 @@ public void readFields(DataInput in) throws IOException {
             }
             case OperationType.OP_DELETE_ANALYSIS_TASK: {
                 data = AnalyzeDeletionLog.read(in);
+                isRead = true;
                 break;
             }
             case OperationType.OP_UPDATE_AUTO_INCREMENT_ID: {