The insert, insertTimeseries, and update virtual methods on MongoProcessInterface accept both a NamespaceString parameter and a command request object (e.g. InsertCommandRequest, UpdateCommandRequest) that already carries its own namespace. This redundancy is error-prone because callers could pass a namespace that differs from the one inside the command, leading to silently inconsistent behavior.

In some implementations the separate NamespaceString parameter is already completely ignored — for example NonShardServerProcessInterface::insert only forwards the command object to performInserts and never references the ns argument. Other implementations like NonShardServerProcessInterface::insertTimeseries do use ns, creating an inconsistency in which source of truth is actually authoritative.

Proposed fix: remove the NamespaceString parameter from insert, insertTimeseries, and update (and their overrides), and derive the namespace from the command request object instead.