[To dev/1.3] Optimize the configuration logic of dn_thrift_max_frame_size

[HTHou]

Summary

Cherry-pick the changes from #16724 onto dev/1.3.

This brings over the optimized dn_thrift_max_frame_size configuration logic, including automatic default calculation from JVM max memory and preserving user-configured positive values.

Notes

• Cherry-picked commits from Optimize the configuration logic of dn_thrift_max_frame_size #16724:
  • 8ffc33a
  • 93996bf
  • a7b9b83
• Resolved one conflict in TElasticFramedTransport.java by keeping the existing dev/1.3 write-frame size check and applying the PR's read-frame validation refactor.

Validation

./mvnw -pl iotdb-core/datanode -am -DskipTests -Dspotless.check.skip=true -Dcheckstyle.skip=true compile

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.2% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 82.22222% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 41.62%. Comparing base (04e6684) to head (e0f4498).

Files with missing lines	Patch %	Lines
.../org/apache/iotdb/rpc/TElasticFramedTransport.java	82.05%	7 Missing ⚠️
...e/iotdb/rpc/TCompressedElasticFramedTransport.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             dev/1.3   #17603      +/-   ##
=============================================
- Coverage      41.62%   41.62%   -0.01%     
  Complexity       234      234              
=============================================
  Files           3610     3610              
  Lines         238026   238054      +28     
  Branches       28892    28896       +4     
=============================================
+ Hits           99086    99091       +5     
- Misses        138940   138963      +23     

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