refactor: Add Lombok annotations to hudi-example modules

[voonhous]

Describe the issue this Pull Request addresses

This PR refactors the hudi-example modules to reduce boilerplate code by leveraging Project Lombok annotations. Specifically, it replaces explicit Logger instantiation, manual getter/setter methods, and empty constructors with their equivalent Lombok annotations (@Slf4j, @Getter, @Setter,@NoArgsConstructor, @AllArgsConstructor, @Data, @Value, @ToString).

This improves code readability and maintainability without altering the runtime logic.

Summary and Changelog

This change introduces the Lombok dependency to the hudi-example modules and refactors several classes to utilize Lombok annotations.

• Added lombok annotations wherever possible to hudi-example modules.

Impact

• Public API: None.
• User Experience: No visible change for end-users.
• Performance: No impact (compile-time code generation).
• Code Health: Reduces lines of code and standardizes logging/accessor patterns.

Risk Level

none

(This is a pure refactoring change involving standard library annotations; no business logic was modified.)

Documentation Update

none

Contributor's checklist

• Read through contributor's guide
• Enough context is provided in the sections above
• Adequate tests were added if applicable

[hudi-bot]

CI report:

• 1b5e6fe Azure: SUCCESS

Bot commands

@hudi-bot supports the following commands:

• @hudi-bot run azure re-run the last Azure build

[yihua]

LGTM