Module metrics 

Structs

InMemoryMetricsSnapshot

Snapshot view of in-memory metrics state.

InMemoryWorkflowMetrics

In-memory adapter useful for tests and lightweight local diagnostics.

NoopWorkflowMetrics

No-op metrics adapter.

Enums

WorkerHealthState

Worker health state used by metrics adapters.

Traits

WorkflowMetrics

Prometheus-friendly workflow metrics surface.