Backport 2b78867cae with the PBS HTTP fixture and connectivity characterisation from a01efeed6b. Exclude unrelated main-line security-status documentation.
Release-line reproduction on 369e7f339e: node-status denial falsely resolves active memory utilisation. Retain active metric alerts until a valid sample arrives; connectivity and policy suppression remain independent.
Validation: go test -race ./internal/alerts ./internal/models ./internal/monitoring -run 'Test.*PBS' -count=3 passes. Installed destination delivery and restart persistence remain unqualified.
Change-source: pulse-maintainer
pulse-triage[bot]
7a5b535a43