[Feature Request] Workflow metrics should be counting each instance

Is your feature request related to a problem? Please describe.

I tried the server dashboard example and can't figure what was the Workflow Completion Overview from an business operationnal point of view. I understood that's because of the rate fonction. The dashboard displays Workflow metrics as it would do for HTTP request

Describe the solution you'd like

Removing the rate fonction in the Workflow's Overviews would allow to present as Y coordinates the unique count of workflow executions instead of per-seconds rate which has only a performance visibility purpose.

Additional context

Otherwise, it could keep a performance view (but well named) plus the business operations view.

Start by locating the Workflow Overviews in the server dashboard example and inspect how their metrics are transformed with the rate function. Done means the overviews show unique workflow execution counts rather than per-second rates; consider whether a separately named performance view is also needed.