Support batch processing over the REST API.

[telackey]

Change Description

The REST API only supports analyzing one text at a time. This adds support for batch processing.

The implementation is backwards compatible: if text is a string, it returns identical results as before. This simply adds support for text to be supplied as a string[] instead, in which case it returns an array of results.

Issue reference

Fixes #XX

Checklist

• I have reviewed the contribution guidelines
• I have signed the CLA (if required)
• My code includes unit tests
• All unit tests and lint checks pass locally
• My PR contains documentation updates / additions if required - (N/A)

[telackey]

@microsoft-github-policy-service agree company="SolidCore.ai"

[SharonHart]

Great addition @telackey!
Can you please update the openapi documentation, it is currenty not autogenerated from the routes defintion