[ISSUE #10438] Fix buildTopicConfigSerializeWrapper exposing live topicConfigTable reference

[chuanxo]

Summary

• buildTopicConfigSerializeWrapper() 直接将 this.topicConfigTable 引用设入 wrapper，与 dataVersion 的 copy 之间存在并发不一致
• 修复：先 copy dataVersion，再用 new ConcurrentHashMap<>(this.topicConfigTable) 做浅拷贝，保证 wrapper 是 point-in-time 一致快照

Fixes #10438

Test plan

• 新增 testSerializeWrapperIsSnapshot 验证 wrapper 持有独立 snapshot，后续写入不可见
• 全量 TopicConfigManagerTest 13 个用例通过
• checkstyle 0 violations

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.98%. Comparing base (7e0cec3) to head (fb6a6a2).

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #10439      +/-   ##
=============================================
- Coverage      48.04%   47.98%   -0.07%     
+ Complexity     13305    13290      -15     
=============================================
  Files           1377     1377              
  Lines         100613   100613              
  Branches       12992    12992              
=============================================
- Hits           48341    48278      -63     
- Misses         46354    46398      +44     
- Partials        5918     5937      +19     

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