- payment_service: split GetDashboardStats (131→35 lines) into 4 sub-functions,
extract applyPagination helper, replace bubble sort with sort.Slice,
use sync.Once for EnsureProviders, define magic number constants
- providers: merge duplicate PC/Mobile functions in alipay/wxpay,
extract loadKeyPair/queryOrderTotalFen in wxpay, add centsToYuan in stripe,
define constants for success codes, currencies, event types
- handlers: extract requireAuth and parseIDParam helpers to eliminate
repeated auth/ID-parsing boilerplate
- registry: remove dead seen map in GetProviderByKey
- types: centralize order status constants in payment package
- load_balancer+config_service: unify duplicated containsType into
exported InstanceSupportsType function
erio
96b1a96cf9