[Question] Why are there two separated api specs for Azure OpenAI (authoring and inference) ? How to bundle these two?

### API Spec link

https://github.com/Azure/azure-rest-api-specs/blob/7f4f4d7bffe69d7dd74ece53980a83f7c41f949e/specification/cognitiveservices/data-plane/AzureOpenAI/inference/preview/2025-04-01-preview/inference.yaml

### API Spec version

2025-04-01-preview

### Question/Query

I want to use Azure OpenAI behind Azure APIM. I tried to use the APIM wizard to import Azure OpenAI API into APIM, but it seems that only inference API is imported. I need both inference and authoring APIs. I tried to bundle the specifications myself but I was not able to import the bundled file into APIM. Is there a documented way to merge these two specs into one file? Is there a place where I can find this bundled file?

### Environment

_No response_

Start by reading the linked inference.yaml and locating the corresponding authoring specification in the AzureOpenAI data-plane tree. Determine whether the repository documents a supported combined OpenAPI import for APIM; done means pointing to an existing bundled file or documenting the supported merge and import procedure.

Written by the indexing model from the issue text.