[DevOps]: Consolidate diagnostic scanner to one file and update crontab example

### Task Details

There are two diagnostic scanner wrappers in `app/scripts/ingestion/sites`. There should only be one and it should use the appropriate config file.

### Steps to Complete

_No response_

### Additional Notes

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Start by listing the two diagnostic scanner wrappers in app/scripts/ingestion/sites and comparing which config file each uses. Then locate the crontab example referenced by the task. Done means one wrapper remains, it uses the appropriate config file, and the example invokes the consolidated scanner.

Written by the indexing model from the issue text.