Add new method to create message back to worker when supervisor signs report

src/Factory/MessageFactory.php

@@ -121,4 +121,18 @@ class MessageFactory
 
         return $msg;
     }
-}
+
+    public static function createSupervisorSignStaffNote(User $sender, User $recipient, MemberCase $case): Messages
+    {
+        $msg = new Messages();
+        $msg->setSender($sender)
+            ->setRecipient($recipient)
+            ->setSent(new DateTimeImmutable())
+            ->setType(MessageType::STAFFING)
+            ->setTitle('Staff Note Signed')
+            ->setMessage("Supervisor signed note for {$case->getCaseName()}")
+        ;
+
+        return $msg;
+    }
+}