Adding Lakebase checks storage backend

[tlgnr]

Changes

Adding Lakebase checks storage backend.

Linked issues

Resolves #444

Tests

• manually tested
• added unit tests
• added integration tests
• added end-to-end tests

[github-actions]

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[Copilot]

Pull Request Overview

This PR adds support for Lakebase as a new storage backend for quality checks, allowing users to store and retrieve checks from Lakebase tables instead of only Delta tables or files.

• Introduces LakebaseChecksStorageConfig configuration class with instance name and database location parameters
• Implements LakebaseChecksStorageHandler with PostgreSQL-based operations for loading and saving checks
• Updates documentation and factory methods to include the new Lakebase backend option

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 7 comments.

File	Description
src/databricks/labs/dqx/engine.py	Updates documentation to include Lakebase storage option
src/databricks/labs/dqx/config.py	Adds LakebaseChecksStorageConfig class with validation
src/databricks/labs/dqx/checks_storage.py	Implements LakebaseChecksStorageHandler with PostgreSQL connection pooling

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[mwojtyczka]

Thanks for the PR!

Please also updated docs and add tests.

Please sign commits: https://databrickslabs.github.io/dqx/docs/dev/contributing/

[Copilot]

Pull Request Overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

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[mwojtyczka]

LGTM