feat(mma): Implement WorkerContext model

tests/test_mma_models.py

@@ -1,5 +1,5 @@
 import pytest
-from models import Ticket, Track
+from models import Ticket, Track, WorkerContext
 
 def test_ticket_instantiation():
     """
@@ -67,3 +67,25 @@ def test_track_can_handle_empty_tickets():
     """
     track = Track(id="TRACK-2", description="Empty Track", tickets=[])
     assert track.tickets == []
+
+def test_worker_context_instantiation():
+    """
+    Verifies that a WorkerContext can be instantiated with ticket_id, 
+    model_name, and messages.
+    """
+    ticket_id = "T1"
+    model_name = "gemini-2.0-flash-lite"
+    messages = [
+        {"role": "user", "content": "Hello"},
+        {"role": "assistant", "content": "Hi there!"}
+    ]
+    
+    context = WorkerContext(
+        ticket_id=ticket_id,
+        model_name=model_name,
+        messages=messages
+    )
+    
+    assert context.ticket_id == ticket_id
+    assert context.model_name == model_name
+    assert context.messages == messages