Module metrics 

In-process counters and gauges for workspace lifecycle (Epic B).

Follows the same pattern as dk-protocol/src/metrics.rs: per-label counters backed by tracing::info! events with a metric field so log-based aggregators can surface them. Each labeled counter family is stored in a DashMap<String, AtomicU64> so a future Prometheus exporter can iterate over all observed label values. The gauge remains a plain AtomicI64 because it has no label dimension.

Functions

incr_workspace_abandoned

Increment “workspace abandoned” counter for the given reason label.

incr_workspace_pinned

Increment “workspace pinned” counter for the given reason label.

incr_workspace_resumed

Increment “workspace resumed” counter for the given outcome label.

incr_workspace_stranded

Increment “workspace stranded” counter for the given reason label.

set_workspace_stranded_active

Set the stranded-active gauge to n (COUNT(*) WHERE stranded_at IS NOT NULL AND abandoned_at IS NULL).

workspace_abandoned_total

Total abandoned events across all reason labels.

workspace_pinned_total

Total pinned events across all reason labels.

workspace_resumed_total

Total resumed events across all outcome labels.

workspace_stranded_active

workspace_stranded_total

Total stranded events across all reason labels.