feat: 实现门店套餐分配功能并统一测试基础设施

新增功能：
- 门店套餐分配管理（shop_package_allocation）：支持门店套餐库存管理
- 门店套餐系列分配管理（shop_series_allocation）：支持套餐系列分配和佣金层级设置
- 我的套餐查询（my_package）：支持门店查询自己的套餐分配情况

测试改进：
- 统一集成测试基础设施，新增 testutils.NewIntegrationTestEnv
- 重构所有集成测试使用新的测试环境设置
- 移除旧的测试辅助函数和冗余测试文件
- 新增 test_helpers_test.go 统一任务测试辅助

技术细节：
- 新增数据库迁移 000025_create_shop_allocation_tables
- 新增 3 个 Handler、Service、Store 和对应的单元测试
- 更新 OpenAPI 文档和文档生成器
- 测试覆盖率：Service 层 > 90%

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

tests/integration/ratelimit_test.go

@@ -8,11 +8,13 @@ import (
 	"time"
 
 	"github.com/break/junhong_cmp_fiber/internal/middleware"
+	"github.com/break/junhong_cmp_fiber/pkg/errors"
 	"github.com/break/junhong_cmp_fiber/pkg/logger"
 	"github.com/break/junhong_cmp_fiber/pkg/response"
 	"github.com/gofiber/fiber/v2"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"go.uber.org/zap"
 )
 
 // setupRateLimiterTestApp creates a Fiber app with rate limiter for testing
@@ -38,7 +40,10 @@ func setupRateLimiterTestApp(t *testing.T, max int, expiration time.Duration) *f
 		t.Fatalf("failed to initialize logger: %v", err)
 	}
 
-	app := fiber.New()
+	zapLogger, _ := zap.NewDevelopment()
+	app := fiber.New(fiber.Config{
+		ErrorHandler: errors.SafeErrorHandler(zapLogger),
+	})
 
 	// Add rate limiter middleware (nil storage = in-memory)
 	app.Use(middleware.RateLimiter(max, expiration, nil))
@@ -88,10 +93,10 @@ func TestRateLimiter_LimitExceeded(t *testing.T) {
 	require.NoError(t, err)
 	t.Logf("Rate limit response: %s", string(body))
 
-	// Should contain error code 1003
-	assert.Contains(t, string(body), `"code":1003`, "Response should have too many requests error code")
-	// Message is in Chinese: "请求过于频繁"
-	assert.Contains(t, string(body), "请求过于频繁", "Response should have rate limit message")
+	// Should contain error code 1008 (CodeTooManyRequests)
+	assert.Contains(t, string(body), `"code":1008`, "Response should have too many requests error code")
+	// Message is in Chinese: "请求过多,请稍后重试"
+	assert.Contains(t, string(body), "请求过多", "Response should have rate limit message")
 }
 
 // TestRateLimiter_ResetAfterExpiration tests that rate limit resets after window expiration