* s3vectors: bound QueryVectors topK at the AWS limit of 30
topK passed through unbounded; AWS caps a query at 30 results, so a
larger request is a ValidationException before it reaches the engine.
* s3vectors: raise QueryVectors topK bound to the AWS limit of 10,000
* s3vectors: validate QueryVectors topK before the catalog lookup
* s3vectors: cover the QueryVectors topK bounds