chore(init): 初始化解忧商行项目并完成 Phase 0 基座

backend/internal/modules/adminfinance/repository.go

@@ -0,0 +1,21 @@
+package adminfinance
+
+import (
+	"github.com/redis/go-redis/v9"
+	"golang.org/x/sync/singleflight"
+	"gorm.io/gorm"
+)
+
+type Repository struct {
+	db      *gorm.DB
+	redis   *redis.Client
+	sfGroup singleflight.Group
+}
+
+func NewRepository(db *gorm.DB, redisClient ...*redis.Client) *Repository {
+	repo := &Repository{db: db}
+	if len(redisClient) > 0 {
+		repo.redis = redisClient[0]
+	}
+	return repo
+}