fix: validate all Lite subscription topics

[Aias00]

Summary

• validate every Lite subscription against the group bound topic
• reject a subscription set when any entry targets a different topic

Closes #10895

Tests

• mvn -pl proxy -Dtest=ClientProcessorTest test (JDK 8)

[Copilot]

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.30%. Comparing base (e345861) to head (24215e2).

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #10897      +/-   ##
=============================================
- Coverage      48.41%   48.30%   -0.12%     
+ Complexity     13571    13531      -40     
=============================================
  Files           1380     1380              
  Lines         101165   101167       +2     
  Branches       13127    13128       +1     
=============================================
- Hits           48981    48866     -115     
- Misses         46220    46305      +85     
- Partials        5964     5996      +32     

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[RockteMQ-AI]

Summary

This PR fixes a validation gap in Lite subscription topic checking. Previously, only the first subscription's topic was validated, meaning mismatched topics in non-first positions would silently pass. The fix iterates through all subscriptions to validate each one.

Verdict: LGTM — clean, minimal fix with proper test coverage using LinkedHashSet to ensure the mismatching entry isn't accidentally first.

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Automated review by github-manager-bot

[RockteMQ-AI]

Summary

Validates all Lite subscriptions against the bound topic, not just the first. Clean validation fix with test coverage.

LGTM.

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Automated review by github-manager-bot