Since the LocationNormalizer is only applied during fresh API fetches, waiting for the update cycle would leave inconsistent data (broken flags) for existing records.

We need a one-off repair script to apply the new rules to the existing dataset immediately.

Scope:

1. Create apps/devindex/buildScripts/fixCountryCodes.mjs.
2. Use the Storage service to load all users.
3. Re-run LocationNormalizer on every user's location string.
4. Update and save the records if the country code changes (e.g., 'DC' -> 'US').