id支持其他类型的分片

[AlbertChenshiqi]

• Do only one thing
• Non breaking API changes
• Tested

What did this pull request do?

有些情况下，我们的自增id不一定是int64，有可能是其他类型，比如uint64或者uint32，使用主键分表会报类型错误, 修改如果config里有ShardingAlgorithm方法接收字段，则id的查询结果会回到这个方法来实现表后缀名修改

User Case Description

使用案例

type Order struct {
	ID      uint64 `gorm:"primarykey"`
	UserID  int64
	Product string
	Deleted gorm.DeletedAt
}

middleware = Register(Config{
		DoubleWrite:         true,
		ShardingKey:         "id",
		NumberOfShards:      4,
                ShardingAlgorithm: func(columnValue any) (suffix string, err error) {
			switch value := columnValue.(type) {
			case uint64, int64:
				return fmt.Sprintf("_%01d", cast.ToUint64(value)%4), nil
			default:
				return "", errors.New("invalid column value")
			}
		},
		PrimaryKeyGenerator: PKCustom,
		PrimaryKeyGeneratorFn: func(_ int64) int64 {
			return 0
		},
	}, &Order{})

db.Use(middleware)