Replace hardcoded PayPo condition (id=6, 40-1000 PLN) with generic
min/max order amount columns on pp_shop_payment_methods. Admin form
fields added, frontend basket checkout filters dynamically. Cache
invalidation on save. 4 new tests (734 total, 2080 assertions).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replaces the manual ZIP packaging workflow with an automated build script.
UpdateRepository now supports both manifest JSON format (new) and legacy
_sql.txt/_files.txt format (fallback), enabling a smooth transition for
existing client instances.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
