simplify task api

lib/workload_service/aggregates/task.ex

@@ -30,8 +30,6 @@ defmodule WorkloadService.Aggregates.Task do
       defstruct [
         :id,
         :application_id,
-        :provider_id,
-        :provider_name,
         :task_info,
         :submission,
         :attachments,
@@ -44,9 +42,7 @@ defmodule WorkloadService.Aggregates.Task do
         %WorkloadService.Events.TaskCreated{
           id: cmd.id,
           application_id: cmd.application_id,
-          provider_id: cmd.provider_id,
-          provider_name: cmd.provider_name,
-          task_info: cmd.task_info || %{},
+          task_info: cmd.task_info,
           attachments: cmd.attachments || []
         }
       end
@@ -71,9 +67,9 @@ defmodule WorkloadService.Aggregates.Task do
       end
 
       @impl Aggregate
-      def execute(%__MODULE__{status: "draft"}, %ApproveSubmission{}) do
+      def execute(%__MODULE__{id: id, status: "draft"}, %ApproveSubmission{}) do
         %WorkloadService.Events.SubmissionApproved{
-          id: nil
+          id: id
         }
       end
 
@@ -101,8 +97,6 @@ defmodule WorkloadService.Aggregates.Task do
           agg
           | id: e.id,
             application_id: e.application_id,
-            provider_id: e.provider_id,
-            provider_name: e.provider_name,
             task_info: e.task_info,
             attachments: e.attachments,
             status: "created",