- Updated PDF template to display a fixed software code instead of "SOFTWARE".
- Changed VAT label to include tax label dynamically and set to 0% for certain conditions.
- Enhanced JavaScript for VAT number validation with asynchronous checks against the VIES database.
- Implemented debounce for VAT number input to optimize validation calls.
- Updated country settings to include country codes for VAT validation.
- Modified email sending functions in webhook handlers to use dynamic attachment names for invoices.
