feat(transport): add sender_id and raw to MessageRef for plugins (#112)

Co-authored-by: Lewis Freiberg <lewis@freiberg.dev>

tests/test_transport.py

@@ -0,0 +1,39 @@
+"""Tests for the transport module."""
+
+from takopi.transport import MessageRef
+
+
+def test_message_ref_sender_id_field() -> None:
+    """Test that MessageRef has sender_id field and it works correctly."""
+    # Without sender_id
+    ref1 = MessageRef(channel_id=123, message_id=456)
+    assert ref1.sender_id is None
+
+    # With sender_id
+    ref2 = MessageRef(channel_id=123, message_id=456, sender_id=789)
+    assert ref2.sender_id == 789
+
+    # sender_id should not affect equality (compare=False)
+    ref3 = MessageRef(channel_id=123, message_id=456, sender_id=999)
+    assert ref2 == ref3  # Same channel_id and message_id
+
+    # sender_id should not affect hash (hash=False)
+    assert hash(ref2) == hash(ref3)
+
+
+def test_message_ref_all_fields() -> None:
+    """Test MessageRef with all fields populated."""
+    raw_data = {"from": {"id": 789, "first_name": "Test"}}
+    ref = MessageRef(
+        channel_id=123,
+        message_id=456,
+        raw=raw_data,
+        thread_id=100,
+        sender_id=789,
+    )
+
+    assert ref.channel_id == 123
+    assert ref.message_id == 456
+    assert ref.raw == raw_data
+    assert ref.thread_id == 100
+    assert ref.sender_id == 789