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 (

superset/databases/filters.py

@@ -23,7 +23,7 @@ from sqlalchemy.orm import Query
 from sqlalchemy.sql.expression import cast
 from sqlalchemy.sql.sqltypes import JSON
 
-from superset import app, security_manager
+from superset import security_manager
 from superset.models.core import Database
 from superset.views.base import BaseFilter
 
@@ -91,7 +91,7 @@ class DatabaseUploadEnabledFilter(BaseFilter):  # pylint: disable=too-few-public
 
         if hasattr(g, "user"):
             allowed_schemas = [
-                app.config["ALLOWED_USER_CSV_SCHEMA_FUNC"](database, g.user)
+                current_app.config["ALLOWED_USER_CSV_SCHEMA_FUNC"](database, g.user)
                 for database in datasource_access_databases
             ]
 

superset/databases/ssh_tunnel/models.py

@@ -18,7 +18,6 @@
 from typing import Any
 
 import sqlalchemy as sa
-from flask import current_app
 from flask_appbuilder import Model
 from sqlalchemy.orm import backref, relationship
 from sqlalchemy.types import Text
@@ -32,8 +31,6 @@ from superset.models.helpers import (
     ImportExportMixin,
 )
 
-app_config = current_app.config
-
 
 class SSHTunnel(AuditMixinNullable, ExtraJSONMixin, ImportExportMixin, Model):
     """