[rocketmq-replicator] Optimize metadata synchronization and fix RocketMQConverter bug

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**BUG REPORT**

1. Please describe the issue you observed:

- What did you do (The steps to reproduce)?

Optimize metadata synchronization and fix RocketMQConverter bug

- What did you expect to see?

- What did you see instead?

2. Please tell us about your environment:

3. Other information (e.g. detailed explanation, logs, related issues, suggestions how to fix, etc):

**FEATURE REQUEST**

1. Please describe the feature you are requesting.

2. Provide any additional detail on your proposed use case for this feature.

2. Indicate the importance of this issue to you (blocker, must-have, should-have, nice-to-have). Are you currently using any workarounds to address this issue?

4. If there are some sub-tasks using -[] for each subtask and create a corresponding issue to map to the sub task:

- [sub-task1-issue-number](example_sub_issue1_link_here): sub-task1 description here,
- [sub-task2-issue-number](example_sub_issue2_link_here): sub-task2 description here,
- ...

Start by locating the rocketmq-replicator metadata synchronization code and the RocketMQConverter class named in the issue. The report provides no reproduction steps, environment, expected behavior, observed behavior, files, or tests, so first determine the specific converter bug and synchronization goal. Done is not verifiable from the issue as written.

Written by the indexing model from the issue text.