[TASK] Standardize Mongo collection operation wrappers

[roberlander2]

Description

The ReplaceOne and UpdateOne wrapper functions in collection.go do not behave the same way, which can lead to some confusion. ReplaceOne does not return mongo.UpdateResult and will return an error if no document is found to replace, but UpdateOne does return mongo.UpdateResult and will not return an error.

Also, FindOne and FindOneAndUpdate return an error that does not clearly indicate whether the requested document was found.

Acceptance Criteria

• Return mongo.UpdateResult object and error from ReplaceOne to standardize with UpdateOne
• Return (bool, error) from FindOne and FindOneAndUpdate to give a better indication of whether the requested document was found

@petyos, @shurwit please let me know what you think of these proposed changes. Thanks.