Fix nested transformer close and move shared classes

[shuwenwei]

Summary

• Propagate ColumnTransformer close calls through nested transformer parents so UDF transformers are closed when nested.
• Move shared query queue and relational metadata classes into common modules to avoid follow-up code conflicts.
• Move TableDiskUsageIndex close after all services are stopped to avoid shutting down the shared index while services may still access it.

[sonarqubecloud]

Quality Gate passed

Issues
7 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
2.5% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 37.50000% with 20 lines in your changes missing coverage. Please review.
✅ Project coverage is 40.36%. Comparing base (9348cb8) to head (53d7364).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
.../column/AbstractCaseWhenThenColumnTransformer.java	0.00%	7 Missing ⚠️
...n/dag/column/ternary/TernaryColumnTransformer.java	0.00%	5 Missing ⚠️
...dag/column/multi/MappableUDFColumnTransformer.java	0.00%	3 Missing ⚠️
...ation/dag/column/unary/UnaryColumnTransformer.java	0.00%	3 Missing ⚠️
...ain/java/org/apache/iotdb/db/service/DataNode.java	0.00%	1 Missing ⚠️
...ction/execute/exception/StopTTLCheckException.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #17642      +/-   ##
============================================
+ Coverage     40.34%   40.36%   +0.02%     
- Complexity     2554     2574      +20     
============================================
  Files          5177     5178       +1     
  Lines        348975   348898      -77     
  Branches      44655    44636      -19     
============================================
+ Hits         140778   140819      +41     
+ Misses       208197   208079     -118     

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