Record active alert verification

docs/roadmap/implementation.md

@@ -1,5 +1,22 @@
 # Active Alert Filtering Cleanup
 
+## Status
+
+Implementation, current-behavior documentation, and automated verification are
+complete.
+
+## Verification Record
+
+Completed on 2026-06-12:
+
+- `go test ./internal/app`
+- `go test ./internal/adapters/inbound/httpapi`
+- `go test ./internal/adapters/inbound/httpapi/presenter`
+- `go test ./...`
+
+Deployment smoke checks were not run from this workspace because the local
+repository state is not a deployed `weatherapi` instance.
+
 ## Summary
 
 Fix `/alerts/active` so it returns alerts that are active at request time, not merely every alert from the latest stored alert snapshot.