Implement new API controllers for wallet management and discount code
validation. This includes adding an Artisan command for exchange rate
updates and refining the API routing structure.
Additionally, perform a significant cleanup of the repository by
removing obsolete migrations, debug scripts, and temporary test files.
Security and configuration improvements include restricting CORS origins
via environment variables and updating the system settings schema.
- Add `WalletController` and `DiscountCodeController` APIs
- Add `UpdateExchangeRates` command
- Remove redundant migrations and debug/test scripts
- Secure CORS configuration using `CORS_ALLOWED_ORIGINS`
- Update `STATUS.md` to reflect current phase progress
