ReferenceError: Can't find variable: CONFIG

## Error

```
Can't find variable: CONFIG
```

## Stack trace

```
/tracks/python:311 in updateGapFiller
/tracks/python:449 in updateFooterPositions
```

## Tracking Details
- **Project**: exercism-js
- **Sentry**: [ReferenceError: Can't find variable: CONFIG](https://thalamus-ai.sentry.io/issues/140570084/)
- **Culprit**: updateGapFiller(tracks/python)
- **First seen:** Aug 13, 2026

Start with the JavaScript code behind /tracks/python, especially updateGapFiller and updateFooterPositions, and use the linked Sentry event and stack trace to trace the CONFIG failure. Done means the /tracks/python page no longer raises this ReferenceError.

Written by the indexing model from the issue text.