[bugfix]: Add missing Link headers in Swagger spec (#2751)

* Adds Link headers to all endpoints that use it for paging
* Fixes the return type for listing what accounts someone follows

internal/api/client/admin/reportsget.go

@@ -112,6 +112,10 @@ import (
 //				type: array
 //				items:
 //					"$ref": "#/definitions/adminReport"
+//			headers:
+//				Link:
+//					type: string
+//					description: Links to the next and previous queries.
 //		'400':
 //			description: bad request
 //		'401':