fix: align opportunity UI with canonical current action

app/opportunity_service.py

@@ -1512,7 +1512,8 @@ def list_opportunities(
     status: Optional[str] = None,
     limit: int = 300,
 ) -> List[Dict[str, Any]]:
-    ensure_opportunity_schema()
+    # Read paths must not attempt startup/migration DDL.  The application
+    # schema is established explicitly before serving requests.
     # A oportunidade mantém dois conceitos diferentes:
     # - o.customer_*: contacto/origem captado da conversa/tarefa;
     # - o.local_customer_id -> customers: ficha fiscal usada em Jasmin/documentos.