TIKA-4526 - Fix nondeterministic failures in TranslateResourceTest by splitting @PUT/@POST handlers

[LucaDai]

Description

**Issue: [TIKA-4526]

Type of change

• New feature
• Bug fix for existing feature
• Code quality improvement
• Addition or Improvement of tests
• Addition/Improvement of documentation

Summary

The failure was caused by ambiguous method mappings in TranslateResource, where both the translate and autoTranslate methods were annotated with both @put and @post at the same time.

A similar issue was fixed in the previous merged PR, which included a detailed explanation and how to reproduce:
#2360

Related Tests

org.apache.tika.server.core.TranslateResourceTest.testTranslateFull
org.apache.tika.server.core.TranslateResourceTest.testTranslateAutoLang

Verification

• ✅ mvn test -pl tika-server/tika-server-core passes.
• ✅ Multiple NonDex runs (-DnondexRuns=100) pass with no flakes.
• ✅ Checkstyle passes.
• ✅ No behavior change to REST paths or media types; only internal method split and safer input handling.

Please let me know if anything needs to change regarding the code style.

[THausherr]

There's still some double code in the language detection. Can you please add another intermediate method for that? E.g. doAutoTranslate() that calls doTranslate().

[LucaDai]

There's still some double code in the language detection. Can you please add another intermediate method for that? E.g. doAutoTranslate() that calls doTranslate().

Thank you for reviewing this PR! I added the doAutoTranslate() method, please check again.