When the check metadata consistency command is spotting a misplaced collection or a collection uuid mismatch, it would be useful to also return the number of documents the collection contains.

If the collection contains zero documents, the error message should explicitly state that it is safe to drop the collection via direct connection for remediating.

This will make troubleshooting much easier for users that collections created unintentionally via direct connections or due to rolling index builds targeting all shards instead of only the ones owning data.