refactor: Add Lombok annotations to hudi-common module (part 2)

[voonhous]

Describe the issue this Pull Request addresses

This PR refactors the hudi-common module 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.

To make the PR more manageable, adding Lombok to hudi-common will be split into multiple parts.

Summary and Changelog

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

• Added lombok annotations wherever possible to hudi-common module.

This PR covers:

1. hudi-common/src/main/java/org/apache/hudi/internal/schema
2. hudi-common/src/main/java/org/apache/hudi/io/storage
3. hudi-common/src/main/java/org/apache/hudi/keygen
4. hudi-common/src/main/java/org/apache/hudi/metadata
5. hudi-common/src/main/java/org/apache/hudi/metrics
6. hudi-common/src/main/java/org/apache/hudi/stats
7. hudi-common/src/main/java/org/apache/hudi/timeline

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

[voonhous]

Subsequent PRs that will be raised after this will cover hudi/hudi-common/src/main/java/org/apache/hudi/common/*.

The refactoring will touch 100++ files, I'll be splitting the changes within this directory into smaller PRs to make reviewing manageable.

[voonhous]

We could change this field to schemaId, and rename this function to getSchemaId (which will be generated by @Getter), but I'm afraid of exploding this PR. So am gonna retain this for now. We can circle back later.

[yihua]

Got it. We can leave it alone for now.

[CTTY]

LGTM in general! Just some minor improvements on logging can be added

[hudi-bot]

CI report:

• cf75913 Azure: SUCCESS

Bot commands

@hudi-bot supports the following commands:

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

[yihua]

LGTM