refactor(architecture): eliminate internal package and complete cordis single-owner model and repository migration

- Physically purged all legacy internal/ packages, centralized pkg/model/ and pkg/repository/
- Migrated domain models and database repositories into self-contained owner plugins (user, auth, message_gateway, admin, upload, risk_control)
- Decoupled cross-plugin interactions via pure core/contracts and typed EventBus
- Ensured 100% test coverage pass, zero data races (-race clean), and 0 lint issues in make code-check

plugins/domain/message_gateway/custom_events_admin_login.go

@@ -7,7 +7,7 @@ import (
 	"context"
 	"time"
 
-	"github.com/Rain-kl/Wavelet/internal/listener"
+	"github.com/Rain-kl/Wavelet/core/contracts"
 )
 
 // AdminLogin is the metadata definition for the admin login event.
@@ -22,7 +22,8 @@ var AdminLogin = EventMetadata{
 	Description: "当管理员成功登录系统时触发此通知",
 }
 
-func handleAdminLogin(ctx context.Context, event listener.AdminLoggedIn) {
+// HandleAdminLoggedIn 处理管理员登录事件并触发通知
+func HandleAdminLoggedIn(ctx context.Context, event contracts.AdminLoggedIn) {
 	if event.User == nil {
 		return
 	}
@@ -38,5 +39,4 @@ func handleAdminLogin(ctx context.Context, event listener.AdminLoggedIn) {
 // RegisterCustomEvents registers default domain push notification events.
 func RegisterCustomEvents() {
 	RegisterBuiltInEvent(AdminLogin)
-	listener.OnAdminLoggedIn(handleAdminLogin)
 }