feat(audit): enhance log filtering to include config change entries

[aschumann-virtualcable]

This pull request enhances the audit report generation in server/src/uds/reports/lists/audit.py by improving how configuration change logs are detected and processed. The main focus is to ensure that configuration changes, even when logged as plain "logs" entries, are included in the report alongside standard REST logs.

Audit log filtering and parsing improvements:

• Updated the log query in gen_data to include both REST log sources and plain log entries that contain the configuration change marker, ensuring all relevant config changes are captured.
• Added logic to detect and parse config change entries stored as plain "logs", extracting the user and value changed, and yielding them in the report in a consistent format.

Codebase enhancements:

• Imported Q from django.db.models to support more flexible query filtering.