Fix: Renamed taxis table to taxis_v2 to force schema update on Render and fix UndefinedColumn error

backend/app/models/taxi.py

@@ -9,7 +9,7 @@ from sqlalchemy import DateTime, func
 class Taxi(SQLModel, table=True):
     """Taxi model representing an authorized taxi."""
     
-    __tablename__ = "taxis"
+    __tablename__ = "taxis_v2"
     
     id: Optional[UUID] = Field(default_factory=uuid4, primary_key=True)
     owner_name: str