Audit log missing entity ID on session delete events

## Summary

When a session is deleted, the audit log entry does not include the entity ID. This makes it difficult to trace which session was deleted.

## Steps to Reproduce

1. Delete a session
1. Check the audit log for the delete event
1. Observe that the entity ID field is missing or empty

## Expected Behavior

The audit log should include the session's entity ID for delete events, consistent with other audit log entries.

## Actual Behavior

The entity ID is not present in the audit log entry for session deletion.

JIRA Issue: BA-5282