chore: proper current_app.config proxy usage (#34345)

Co-authored-by: Claude <noreply@anthropic.com>

superset/databases/api.py

@@ -25,13 +25,20 @@ from typing import Any, cast
 from zipfile import is_zipfile, ZipFile
 
 from deprecation import deprecated
-from flask import make_response, render_template, request, Response, send_file
+from flask import (
+    current_app as app,
+    make_response,
+    render_template,
+    request,
+    Response,
+    send_file,
+)
 from flask_appbuilder.api import expose, protect, rison, safe
 from flask_appbuilder.models.sqla.interface import SQLAInterface
 from marshmallow import ValidationError
 from sqlalchemy.exc import NoSuchTableError, OperationalError, SQLAlchemyError
 
-from superset import app, event_logger
+from superset import event_logger
 from superset.commands.database.create import CreateDatabaseCommand
 from superset.commands.database.delete import DeleteDatabaseCommand
 from superset.commands.database.exceptions import (