feat: 实现套餐管理模块，包含套餐系列、双状态管理、废弃模型清理

- 新增套餐系列管理 (CRUD + 状态切换)
- 新增套餐管理 (CRUD + 启用/禁用 + 上架/下架双状态)
- 清理 8 个废弃分佣模型及对应数据库表
- Package 模型新增建议成本价、建议售价、上架状态字段
- 完整的 Store/Service/Handler 三层实现
- 包含单元测试和集成测试
- 归档 add-package-module change
- 新增多个 OpenSpec changes (订单支付、店铺套餐分配、一次性分佣、卡设备系列绑定)

tests/unit/shop_service_test.go

@@ -39,7 +39,7 @@ func TestShopService_Create(t *testing.T) {
 			District:     "朝阳区",
 			Address:      "朝阳路100号",
 			InitUsername: generateUniqueUsername("admin", t),
-			InitPhone:    "13800138001",
+			InitPhone:    generateUniquePhone(),
 			InitPassword: "password123",
 		}
 
@@ -80,7 +80,7 @@ func TestShopService_Create(t *testing.T) {
 			ContactName:  "王五",
 			ContactPhone: "13800000003",
 			InitUsername: generateUniqueUsername("agent", t),
-			InitPhone:    "13800138002",
+			InitPhone:    generateUniquePhone(),
 			InitPassword: "password123",
 		}
 
@@ -132,7 +132,7 @@ func TestShopService_Create(t *testing.T) {
 			ContactName:  "测试",
 			ContactPhone: "13800000008",
 			InitUsername: generateUniqueUsername("level8", t),
-			InitPhone:    "13800138008",
+			InitPhone:    generateUniquePhone(),
 			InitPassword: "password123",
 		}
 
@@ -195,7 +195,7 @@ func TestShopService_Create(t *testing.T) {
 			ContactName:  "测试",
 			ContactPhone: "13800000009",
 			InitUsername: generateUniqueUsername("invalid", t),
-			InitPhone:    "13800138009",
+			InitPhone:    generateUniquePhone(),
 			InitPassword: "password123",
 		}
 
@@ -219,7 +219,7 @@ func TestShopService_Create(t *testing.T) {
 			ContactName:  "测试",
 			ContactPhone: "13800000010",
 			InitUsername: generateUniqueUsername("unauth", t),
-			InitPhone:    "13800138010",
+			InitPhone:    generateUniquePhone(),
 			InitPassword: "password123",
 		}