kotlin-spring: minor updates

[wing328]

fyi @karismann (2019/03) @Zomzog (2019/04) @andrewemery (2019/10) @4brunu (2019/11) @yutaka0m (2020/03) @stefankoppier (2022/06) @e5l (2024/10)

PR checklist

• Read the contribution guidelines.
• Run the following to build the project and update samples:

  ./mvnw clean package || exit
  ./bin/generate-samples.sh ./bin/configs/*.yaml || exit
  ./bin/utils/export_docs_generators.sh || exit
  

  (For Windows users, please run the script in WSL)
  Commit all changed files.
  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.
  These must match the expectations made by your contribution.
  You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example ./bin/generate-samples.sh bin/configs/java*.
  IMPORTANT: Do NOT purge/delete any folders/files (e.g. tests) when regenerating the samples as manually written tests may be removed.
• If your PR is targeting a particular programming language, @mention the technical committee members, so they are more likely to review the pull request.

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Summary by cubic

Refactored Kotlin Spring server codegen to use Lombok for accessors and make internal fields final. No behavior or generated code changes.

• Refactors
  • Replaced manual getDescription() in RequestMappingMode with @Getter; made description final.
  • Applied @Getter/@Setter to requestMappingMode and removed manual accessors.
  • Marked modelToSealedInterfaces and sealedInterfaceToOperationId as final.
  • Simplified a return type assignment by inlining a temporary variable.

^{Written for commit c3aee85. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}