fix query helpers and add policy type to projections

lib/workload_service/projections/task.ex

@@ -8,13 +8,14 @@ defmodule WorkloadService.Projections.Task do
   import Ecto.Changeset
 
   @derive {Flop.Schema,
-           filterable: [:status, :org_id, :application_id],
+           filterable: [:status, :org_id, :application_id, :policy_type],
            sortable: [:inserted_at, :updated_at, :status]}
 
   @primary_key {:id, :string, []}
   schema "tasks" do
     field(:org_id, :string)
     field(:application_id, :string)
+    field(:policy_type, :string)
     field(:task_info, :map)
     field(:submission, :map)
     field(:attachments, {:array, :string})
@@ -37,6 +38,7 @@ defmodule WorkloadService.Projections.Task do
       :id,
       :org_id,
       :application_id,
+      :policy_type,
       :task_info,
       :submission,
       :attachments,