metrics

type Metrics struct {
	// Task metrics
	TasksSubmitted  atomic.Int64
	TasksCompleted  atomic.Int64
	TasksFailed     atomic.Int64
	TasksCancelled  atomic.Int64
	TasksInProgress atomic.Int64
	TasksQueued     atomic.Int64

	// Queue metrics
	QueueSize    atomic.Int64
	QueueLatency atomic.Int64 // in nanoseconds

	// Worker metrics
	ActiveWorkers     atomic.Int64
	IdleWorkers       atomic.Int64
	WorkerUtilization atomic.Uint64 // percentage * 100 (to avoid floating point)

	// Performance metrics
	AverageTaskTime atomic.Int64 // in nanoseconds
	TotalTaskTime   atomic.Int64 // in nanoseconds
	TaskCount       atomic.Int64
}