In CAM-3849, we have added documentation on the user operation log and which entries are created when cockpit operations are performed.
The glossary of all possible operation types is not complete yet. The task is to complete the list by going through the code.

Link to glossary: stage.docs.camunda.org/guides/user-guide/#process-engine-history-and-audit-event-log-glossary-of-operations-logged-in-the-user-operation-log