In some cases, method GetNearestMatchesAsync in specific memory provider returns empty result set when collection doesn't exist (e.g. Qdrant). In other memory providers the method throws an exception (e.g. Chroma).

It would be great to align all memory providers to use the same flow.

My suggestion: when collection doesn't exist, method GetNearestMatchesAsync should throw an exception, in similar way how other methods work (Get, Upsert, Remove etc.). This will allow to show the consumer that something is wrong with memory setup. While empty result set should be returned only when collection exists, but it's empty.

This approach will allow to differentiate two cases in the code and react to them appropriately.