Currently we're using the ?type=... querystring filter, which acts as a postfilter. Because of this the "status" facet is wrongly displaying totals for all requests in the system (communtiy inclusion, memberships, etc.).

There are a couple of ways to solve this:

1. "Bake" into the q parameter a "hidden" search query that will filter the request type. I.e. `(type:record-deletion) AND (...<user's query>...)
2. Introduce a new querystring filter param which doesn't just post-filter, e.g. ?type_filter=... or similar.
3. Create a new REST API endpoint like /api/admin/requests (or similar) which is pre-filtering all request types that we want to handle in the administration panel (see community requests REST API service method)