Add CEL support for Data Quality rules

[rayokota]

Add CEL support for Data Quality rules

What

Checklist

• Contains customer facing changes? Including API/behavior changes
• Did you add sufficient unit test and/or integration test coverage for this PR?
  • If not, please explain why it is not required

References

JIRA:

Test & Review

Open questions / Follow-ups

[Copilot]

Pull Request Overview

This PR adds support for CEL-based data quality rules by introducing new CEL executors and enhancing the Avro serializer/deserializer tests to cover CEL conditions and field transformations.

• Added new CEL executors (CelExecutor and CelFieldExecutor) for condition and field transform rules.
• Extended test coverage in Avro serializer specs with CEL condition, failure, and transform cases.
• Updated package.json to include the CEL library dependency.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

File	Description
schemaregistry/test/serde/avro.spec.ts	Updated tests to register and verify CEL rules and transformations.
schemaregistry/rules/cel/cel-field-executor.ts	Added a new executor class for CEL-based field transformations.
schemaregistry/rules/cel/cel-executor.ts	Introduced a CEL executor for condition-based rules with caching and evaluation.
schemaregistry/package.json	Added dependency for the CEL library.