[WIP] Seatunnel deltalake

[HaoXuAI]

fix: #9027

Purpose of this pull request

Does this PR introduce any user-facing change?

How was this patch tested?

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config
• Update the release-note.

[Copilot]

Pull Request Overview

This pull request adds a new DeltaLake connector to SeaTunnel including source implementation, split enumerators, catalog integration, configuration, and data deserialization.

• Introduces new classes for DeltaLake source reading and catalog management
• Implements split enumeration, source reader, and configuration options for DeltaLake integration
• Adds support for Kerberos authentication in the catalog loader

Reviewed Changes

Copilot reviewed 31 out of 32 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
DeltaLakeEnumerationResult.java	New DTO class for encapsulating file scan task splits and enumeration positions
DeltaLakeBatchSplitEnumerator.java	Implements batch split enumeration by loading splits from tables and assigning them to readers
AbstractSplitEnumerator.java	Base implementation for split enumeration including pending tables and splits management
DeltaLakeSource.java	Adds DeltaLake source implementation with configuration for bounded/unbounded mode
StaticPathResolver.java & MetastoreResolver.java	Provide static path resolution for table metadata
DeltalakeConnectorException.java & DeltalakeConnectorErrorCode.java	Define custom exception and error codes for DeltaLake connector errors
Deserializer.java, DefaultDeserializer.java, DeltalakeTypeMapper.java	Introduce data deserialization and type mapping logic for DeltaLake formats
SourceTableConfig.java, DeltaLakeSourceOptions.java, DeltaLakeSourceConfig.java, DeltaLakeCommonOptions.java, DeltaLakeCommonConfig.java	Configure options and encapsulate configuration details for DeltaLake integration
DeltaLakeCatalog.java & DeltaLakeCatalogLoader.java	Implement catalog integration with support for Kerberos authentication and DeltaLake table loading

Files not reviewed (1)

• seatunnel-connectors-v2/connector-deltalake/pom.xml: Language not supported

Comments suppressed due to low confidence (1)

seatunnel-connectors-v2/connector-deltalake/src/main/java/org/apache/seatunnel/connectors/seatunnel/deltalake/config/SourceTableConfig.java:69

• The use of table.lastIndexOf("\.") is likely incorrect since lastIndexOf does not treat the argument as a regex; it should probably be lastIndexOf('.') to locate the dot character correctly.

String namespace = table.substring(0, table.lastIndexOf("\."));

[Copilot]

Inside the lambda, a new DeltaLakeFileScanTaskSplit is constructed when split.getTablePath() is null, but the new instance is never returned, resulting in a null value. Consider returning the newly created split instead of always returning null.

Suggested change

	new DeltaLakeFileScanTaskSplit(
	return new DeltaLakeFileScanTaskSplit(