[lake/hudi] Introduce fluss-lake-hudi module and HudiLakeStorage

[fhan688]

Purpose

Linked issue: #3258

Introduce an initial Hudi LakeStorage plugin module for Fluss and wire it into build/distribution, so Hudi can be recognized as a supported data lake format.

Brief change log

• Add HUDI("hudi") to DataLakeFormat.
• Introduce new module fluss-lake-hudi.
• Add HudiLakeStorage and HudiLakeStoragePlugin as the initial Hudi LakeStorage implementation scaffold.
• Register LakeStoragePlugin via service loader metadata.
• Include the new module in lake parent modules and distribution/plugin assembly.
• Update quickstart-flink build preparation to include hudi plugin artifact.

Tests

• This commit mainly introduces module/plugin scaffolding and build wiring.

• Suggested verification:

mvn -pl fluss-lake/fluss-lake-hudi -am clean test
mvn -pl fluss-dist -am clean package -DskipTests

• No dedicated Hudi functional UT/IT is included in this commit.

API and Format

• API impact: additive change by introducing HUDI in DataLakeFormat.
• No storage format migration or incompatible format change in this PR.

Documentation

• No user-facing documentation changes in this PR.
• Hudi usage/configuration docs can be added in a follow-up PR.

[Copilot]

Pull request overview

This PR introduces an initial Apache Hudi lake-storage plugin module (fluss-lake-hudi) and wires it into the Fluss build and distribution so that “hudi” can be selected as a lake format and the plugin can be discovered via ServiceLoader.

Changes:

• Adds HUDI("hudi") to DataLakeFormat and introduces a new fluss-lake-hudi module with stub HudiLakeStorage + HudiLakeStoragePlugin.
• Wires the new module into Maven reactor (fluss-lake/pom.xml), dist plugin assembly (fluss-dist), and quickstart build preparation.
• Adds a Hudi Flink bundle dependency (provided) and a new hudi.version Maven property.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
pom.xml	Adds hudi.version property for dependency management.
fluss-lake/pom.xml	Adds fluss-lake-hudi to the lake parent reactor modules.
fluss-lake/fluss-lake-hudi/pom.xml	New module POM for the Hudi lake plugin.
fluss-lake/fluss-lake-hudi/src/main/java/org/apache/fluss/lake/hudi/HudiLakeStorage.java	Adds initial (stub) LakeStorage implementation for Hudi.
fluss-lake/fluss-lake-hudi/src/main/java/org/apache/fluss/lake/hudi/HudiLakeStoragePlugin.java	Adds LakeStoragePlugin implementation for ServiceLoader discovery.
fluss-lake/fluss-lake-hudi/src/main/resources/META-INF/services/org.apache.fluss.lake.lakestorage.LakeStoragePlugin	Registers HudiLakeStoragePlugin via ServiceLoader metadata.
fluss-lake/fluss-lake-hudi/src/main/resources/META-INF/NOTICE	Adds NOTICE file for the new module.
fluss-lake/fluss-lake-hudi/src/test/resources/log4j2-test.properties	Adds test logging configuration for the new module.
fluss-lake/fluss-lake-hudi/src/test/resources/org.junit.jupiter.api.extension.Extension	Adds JUnit extension auto-registration for tests.
fluss-flink/fluss-flink-common/pom.xml	Adds provided Hudi Flink bundle dependency.
fluss-dist/src/main/assemblies/plugins.xml	Copies the built fluss-lake-hudi jar into plugins/hudi/ in the dist.
fluss-dist/pom.xml	Adds fluss-lake-hudi as a (provided) dependency for build ordering/wiring.
fluss-common/src/main/java/org/apache/fluss/metadata/DataLakeFormat.java	Adds HUDI to supported DataLakeFormat enum values.
docker/quickstart-flink/prepare_build.sh	Includes Hudi plugin build output directory in quickstart build preparation.

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[luoyuxia]

cc @XuQianJin-Stars