GET /api/dashboard/{id}/params/{param-key}/values

Fetch possible values of the parameter whose ID is :param-key. If the values come directly from a query, optionally restrict these values by passing query parameters like other-parameter=value e.g.

;; fetch values for Dashboard 1 parameter 'abc' that are possible when parameter 'def' is set to 100
GET /api/dashboard/1/params/abc/values?def=100