refactor(message.py): rename mac -> id

src/judas_protocol/message.py

@@ -165,11 +165,11 @@ class Message:
         )
 
     @classmethod
-    def hello(cls, mac: str) -> Message:
+    def hello(cls, id_: str) -> Message:
         """Create a HELLO message.
 
         Args:
-            mac (str): The MAC address to include in the HELLO message.
+            id_ (str): The ID to include in the HELLO message.
         Returns:
             Message: The created HELLO message.
         """
@@ -177,7 +177,7 @@ class Message:
             id_=None,
             category=Category.CONTROL,
             action=ControlAction.HELLO,
-            payload={"mac": mac},
+            payload={"id": id_},
             acknowledged=False,
             ack_required=True,
         )