fix: improve maintenance and synchronize live conversations

backend/app/models/schemas/lead_capture.py

@@ -15,7 +15,7 @@ limitations under the License.
 """
 
 from pydantic import BaseModel, ConfigDict, Field, field_validator
-from typing import Optional, List, Dict, Any
+from typing import Optional, List
 from uuid import UUID
 
 # Reuse the ORM enums so the API contract can never drift from the DB.