Fix critical bugs

tests/services/test_conversation_service.py

@@ -519,14 +519,25 @@ class TestStandardConversation:
         sample_request: ConversationRequest,
         sample_session: ConversationSession,
     ) -> None:
-        """Test standard conversation loads history."""
+        """Test standard conversation loads history for old sessions."""
+        # Make session older than 30 minutes to trigger history loading
+        old_session = ConversationSession(
+            session_id=sample_session.session_id,
+            user_id=sample_session.user_id,
+            telefono=sample_session.telefono,
+            created_at=datetime.now(UTC) - timedelta(minutes=45),
+            last_modified=sample_session.last_modified,
+            last_message=sample_session.last_message,
+            pantalla_contexto=sample_session.pantalla_contexto,
+        )
+
         await conversation_service._handle_standard_conversation(
             request=sample_request,
-            session=sample_session,
+            session=old_session,
         )
 
         mock_firestore.get_entries.assert_awaited_once_with(
-            sample_session.session_id,
+            old_session.session_id,
             limit=60,
         )