BE | Ask VA Api: translate category id to category name

[Khoa-V-Nguyen]

Summary

This PR enhances the Inquiries::Retriever class and updates related tests and mock data:

Changes Made

• Enhancement of Inquiries::Retriever:
  • Implemented translation of category_id to category_name to improve data readability and consistency.

-**Add created_on to Correspondences::Entity and Correspondences::Serializer

• Test Updates:

  • Updated test user identifier from test_user_228 to test_user_229 to reflect the latest test scenarios.

• Mock Data Adjustments:

  • Refreshed mock files to align with the updated logic and data structure changes.

• Spec Modifications:

  • Revised specs to accommodate the changes in Retriever functionality and updated mock data.

Related issue(s)

• https://github.com/department-of-veterans-affairs/ask-va/issues/1306

Testing done

• New code is covered by unit tests

Acceptance criteria

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• Documentation has been updated (link to documentation)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Feature/bug has a monitor built into Datadog (if applicable)
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected

[hemeshvpatel]

Lgtm

[hemeshvpatel]

lgtm

[github-actions]

Backend-review-group approval confirmed.