Update DeltaV References to AI Engine in API Documentation

[cmaliwal]

Prerequisites

• [X] I checked the existing issues and made sure there are no similar bug reports

Category

Incorrect or missing Content

Expected Behavior / Content

The API documentation should refer to the backend as "AI Engine" instead of "DeltaV".

Observed Behavior / Content

The API documentation currently refers to the backend as "DeltaV" instead of "AI Engine".

To Reproduce

No response

Environment Details (Optional)

No response

Failure Logs (Optional)

No response

Additional Information (Optional)

No response