feat(sources): add new endpoint to retrieve list of sources according to a list of IDs

[agong-coveo]

This PR is done in continuation of this addition.

• Adding a new endpoint that returns the models specified in the body.
  • It is basically the same as the listOperationalStatus call. However, it's a POST request and accepts a list of source IDs in its body.

Acceptance Criteria

• My changes are publicly available, documented, and deployed in production. (i.e. on Swagger)
• JSDoc annotates each property added in the exported interfaces
• The proposed changes are covered by unit tests
• Commits containing breaking changes a properly identified as such
• README.md is adjusted to reflect the proposed changes (if relevant)
• My merge commit message will be conventional (See Conventional Commit)