fix(compass-generative-ai): fix api contract and anticipate future change CLOUDP-344335

[kpamaran]

Description

Note: This feature is in development. Normally, if the feature was already rolled out we would version the API change.

Previously there was a zod parse failure because the response data is not wrapped in content. This also removes two fields isArray and probability from the contract, to get ahead of a planned removal of the 2 fields from the backend.

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added
• If this change updates the UI, screenshots/videos are added and a design review is requested
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)

Motivation and Context

• Bugfix
• New feature
• Dependency update
• Misc

Open Questions

Dependents

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

[codeowners-service-app]

Assigned kraenhansen for team compass-developers because mabaasit is out of office.

[kpamaran]

@jcobis please double-check the removal of isArray and probability cover all the low hanging fruit API changes

[jcobis]

LGTM