Expand /executions filters in public api

Problem

The current API only returns executions that are not currently running (It’s specifically mentioned here ).
While I understand that this is for performance reasons, there should still be a method to obtain running executions without having to pass through the private API.

Proposed solution

Allow expanded filters in /executions, by not limiting status to the three current values.
Allow the user to obtain currently running workflows, whether through filtering implicitly by not using status=["running"], or filtering explicitly through some other query parameter