refactor(auth): modularize auth plugin with physical subpackages and decoupled services

backend/plugins/domain/auth/dao/dao.go

@@ -0,0 +1,61 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+// Package dao provides data access objects and caching for the auth domain plugin.
+package dao
+
+import (
+	"Wavelet/core/contracts"
+	"context"
+
+	"gorm.io/gorm"
+)
+
+// DAO aggregates all data access objects for the auth domain plugin.
+type DAO struct {
+	dbSvc      contracts.DBService
+	cacheSvc   contracts.CacheService
+	limiterSvc contracts.LimiterService
+}
+
+// New creates a new DAO aggregate.
+func New(dbSvc contracts.DBService, cacheSvc contracts.CacheService, limiterSvc contracts.LimiterService) *DAO {
+	return &DAO{
+		dbSvc:      dbSvc,
+		cacheSvc:   cacheSvc,
+		limiterSvc: limiterSvc,
+	}
+}
+
+// SetDBService updates the DBService reference.
+func (d *DAO) SetDBService(db contracts.DBService) {
+	d.dbSvc = db
+}
+
+// SetCacheService updates the CacheService reference.
+func (d *DAO) SetCacheService(cache contracts.CacheService) {
+	d.cacheSvc = cache
+}
+
+// SetLimiterService updates the LimiterService reference.
+func (d *DAO) SetLimiterService(limiter contracts.LimiterService) {
+	d.limiterSvc = limiter
+}
+
+// DB returns the GORM DB instance associated with the request context.
+func (d *DAO) DB(ctx context.Context) *gorm.DB {
+	if d.dbSvc != nil {
+		return d.dbSvc.DB(ctx)
+	}
+	return nil
+}
+
+// Cache returns the CacheService instance.
+func (d *DAO) Cache() contracts.CacheService {
+	return d.cacheSvc
+}
+
+// Limiter returns the LimiterService instance.
+func (d *DAO) Limiter() contracts.LimiterService {
+	return d.limiterSvc
+}