I was able to successfully use a skillset (keyword extraction) for a column using an Indexer importing data from a Cosmos DB collection. However I want to eventually use the .NET SDK's DocumentsOperationsExtensions's IndexAsync() method to add documents to the index ( as I already have a change feed listener on the Cosmos DB collection and want to leverage that instead of running a periodic indexer querying Cosmos DB).
But I don't see how I can specify the skillset to be used when adding the document to the index using the SDK approach (or even the REST API one - https://learn.microsoft.com/en-us/rest/api/searchservice/addupdate-or-delete-documents). Is this a supported scenario? Or are we obligated to use an Indexer if we have to leverage skillsets?