Agent Skills: ring:mapping-streaming-events

Mapping the eventable points in a Lerian Go service where lib-streaming should emit past-tense, durable, tenant-scoped business events, producing a PM-validated event catalog and instrumentation-map.json for ring:instrumenting-streaming-events. Three-pass discovery (Survey, Slice, Mark) with a scope fence and delivery postures. Use to inventory eventable points. Skip on non-Go, infra-only, or consumer-only services.