Model.findById - Read from Replica #672
Description
Enhance model methods backed by KV operations to support reading from replicas
Model.findById uses collection.get(key); under the hood which fetches the document from Couchbase datastore's active node.
We need to enhance this by adding a findOption replica by default replica will be fault (the behavior that exists today) but when set to true findById should be able to attempt to get a document from the replica in lieu of document not found in the active node.