feat(iap/apple): 实现苹果IAP非续期订阅功能

新增苹果IAP相关接口与逻辑，包括产品列表查询、交易绑定、状态查询和恢复购买功能。移除旧的IAP验证逻辑，重构订阅系统以支持苹果IAP交易记录存储和权益计算。

- 新增/pkg/iap/apple包处理JWS解析和产品映射
- 实现GET /products、POST /attach、POST /restore和GET /status接口
- 新增apple_iap_transactions表存储交易记录
- 更新文档说明配置方式和接口规范
- 移除旧的AppleIAP验证和通知处理逻辑

internal/model/iap/apple/default.go

@@ -0,0 +1,68 @@
+package apple
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+
+	"github.com/perfect-panel/server/pkg/cache"
+	"github.com/redis/go-redis/v9"
+	"gorm.io/gorm"
+)
+
+type Model interface {
+	Insert(ctx context.Context, data *Transaction, tx ...*gorm.DB) error
+	FindByOriginalId(ctx context.Context, originalId string) (*Transaction, error)
+	FindByUserAndProduct(ctx context.Context, userId int64, productId string) (*Transaction, error)
+}
+
+type defaultModel struct {
+	cache.CachedConn
+	table string
+}
+
+type customModel struct {
+	*defaultModel
+}
+
+func NewModel(db *gorm.DB, c *redis.Client) Model {
+	return &customModel{
+		defaultModel: &defaultModel{
+			CachedConn: cache.NewConn(db, c),
+			table:      "`apple_iap_transactions`",
+		},
+	}
+}
+
+func (m *defaultModel) jwsKey(jws string) string {
+	sum := sha256.Sum256([]byte(jws))
+	return fmt.Sprintf("cache:iap:jws:%s", hex.EncodeToString(sum[:]))
+}
+
+func (m *customModel) Insert(ctx context.Context, data *Transaction, tx ...*gorm.DB) error {
+	return m.ExecCtx(ctx, func(conn *gorm.DB) error {
+		if len(tx) > 0 {
+			conn = tx[0]
+		}
+		return conn.Model(&Transaction{}).Create(data).Error
+	}, m.jwsKey(data.JWSHash))
+}
+
+func (m *customModel) FindByOriginalId(ctx context.Context, originalId string) (*Transaction, error) {
+	var data Transaction
+	key := fmt.Sprintf("cache:iap:original:%s", originalId)
+	err := m.QueryCtx(ctx, &data, key, func(conn *gorm.DB, v interface{}) error {
+		return conn.Model(&Transaction{}).Where("original_transaction_id = ?", originalId).First(&data).Error
+	})
+	return &data, err
+}
+
+func (m *customModel) FindByUserAndProduct(ctx context.Context, userId int64, productId string) (*Transaction, error) {
+	var data Transaction
+	err := m.QueryNoCacheCtx(ctx, &data, func(conn *gorm.DB, v interface{}) error {
+		return conn.Model(&Transaction{}).Where("user_id = ? AND product_id = ?", userId, productId).Order("purchase_at DESC").First(&data).Error
+	})
+	return &data, err
+}
+

internal/model/iap/apple/transaction.go

@@ -0,0 +1,21 @@
+package apple
+
+import "time"
+
+type Transaction struct {
+	Id                   int64      `gorm:"primaryKey"`
+	UserId               int64      `gorm:"index:idx_user_id;not null;comment:User ID"`
+	OriginalTransactionId string     `gorm:"type:varchar(255);uniqueIndex:uni_original;not null;comment:Original Transaction ID"`
+	TransactionId        string     `gorm:"type:varchar(255);not null;comment:Transaction ID"`
+	ProductId            string     `gorm:"type:varchar(255);not null;comment:Product ID"`
+	PurchaseAt           time.Time  `gorm:"not null;comment:Purchase Time"`
+	RevocationAt         *time.Time `gorm:"comment:Revocation Time"`
+	JWSHash              string     `gorm:"type:varchar(255);not null;comment:JWS Hash"`
+	CreatedAt            time.Time  `gorm:"<-:create;comment:Create Time"`
+	UpdatedAt            time.Time  `gorm:"comment:Update Time"`
+}
+
+func (Transaction) TableName() string {
+	return "apple_iap_transactions"
+}
+