Fix Python SDK Ruff failures

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: stephentoub

python/copilot/session.py

@@ -54,9 +54,8 @@
     ExternalToolRequestedData,
     PermissionRequest,
     PermissionRequestedData,
-    SessionEvent,
     SessionErrorData,
-    SessionEventType,
+    SessionEvent,
     SessionIdleData,
     session_event_from_dict,
 )
@@ -1270,7 +1269,9 @@ def _handle_broadcast_event(self, event: SessionEvent) -> None:
                     return  # This client doesn't handle permissions; another client will.
 
                 asyncio.ensure_future(
-                    self._execute_permission_and_respond(request_id, permission_request, perm_handler)
+                    self._execute_permission_and_respond(
+                        request_id, permission_request, perm_handler
+                    )
                 )
 
             case CommandExecuteData() as data:

python/e2e/test_session_fs.py

@@ -13,15 +13,14 @@
 
 from copilot import CopilotClient, SessionFsConfig, define_tool
 from copilot.client import ExternalServerConfig, SubprocessConfig
-from copilot.generated.session_events import SessionCompactionCompleteData
 from copilot.generated.rpc import (
     SessionFSExistsResult,
     SessionFSReaddirResult,
     SessionFSReaddirWithTypesResult,
     SessionFSReadFileResult,
     SessionFSStatResult,
 )
-from copilot.generated.session_events import SessionEvent
+from copilot.generated.session_events import SessionCompactionCompleteData, SessionEvent
 from copilot.session import PermissionHandler
 
 from .testharness import E2ETestContext