submissions: add AcceptedBy, UploadedBy fields to model

pkg/model/submission.go

@@ -40,6 +40,10 @@ type Submission struct {
 	CreatedAt     time.Time
 	UpdatedAt     time.Time
 	Submitter     int64 // UserID
+	// Who clicked the Accept button
+	AcceptedBy    int64 // UserID
+	// Who clicked the Upload button
+	UploadedBy    int64 // UserID
 	AssetID       int64
 	AssetVersion  int64
 	ValidatedAssetID       int64