Generate a JSON Schema for datasetConfig from DatasetConfig

[vinishjail97]

Feature Request / Improvement

Publish a JSON Schema for datasetConfig.yaml, generated from the DatasetConfig class rather than written by hand.

Why

Writing a valid datasetConfig is the first thing a new user does and the first place they get stuck: sourceFormat, targetFormats, tableBasePath, tableName, namespace, partitionSpec, and the right conversionSourceProviderClass. Today the only description of that shape is prose in the docs, so it drifts from the code silently.

A generated schema gives three things at once:

• Editors and IDEs validate and complete the file.
• Any agent or script can check a config before running a sync, instead of discovering problems from a stack trace.
• The documentation stops being a second source of truth that can go stale.

PR #829 includes a hand-written config-schema.md for exactly this purpose. That is the thing to replace with something generated.

Scope

• Generate a JSON Schema from DatasetConfig and its nested types at build time.
• Publish it as a release artifact and at a stable URL, so $schema references keep working.
• Fail the build when the schema is out of date with the model, so it cannot silently drift.
• Reference it from the docs in place of any hand-maintained field list.

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct