add service

api/proto/request/request.proto

@@ -57,7 +57,7 @@ message GetMailingListByIDRequest {
 }
 
 message GetMailingListByIDResponse {
-  MailingItem item = 1;
+  MailingDetail detail = 1;
 }
 
 message MailingItem {
@@ -68,3 +68,10 @@ message MailingItem {
   google.protobuf.Timestamp created_at = 5;
   int32 suppliers_found = 6;
 }
+
+message MailingDetail {
+  string request_id = 1;
+  string title = 2;
+  string mail_text = 3;
+  repeated Supplier suppliers = 4;
+}