以下是整合了所有改进点的完整代码实现：

package mainimport ("bytes""context""fmt""io""log""net/http""sync""time""github.com/go-redis/redis/v8""github.com/robfig/cron/v3""golang.org/x/time/rate"
)// 任务状态常量
const (StatusReady    = "就绪"StatusRunning  = "运行中"StatusStopped  = "已停止"StatusDisabled = "已禁用"
)// 任务类型常量
const (TaskTypePeriodic = "periodic" // 周期性任务TaskTypeOneShot  = "oneshot"  // 一次性任务
)// API调用结果结构
type APIResult struct {StatusCode int           // HTTP状态码Body       string        // 响应体Error      error         // 错误信息Duration   time.Duration // 耗时Retries