Mock-mode reset replaces the state pointer while API and mock-alert readers can still be active. Capture the initialized pointer under the monitor lock and preserve its fallback alerts rather than reading the replaceable pointer again.
Reproduce the race without Start workers, verify reset snapshot isolation, and retain live alert-manager precedence. This repairs the beta.3 preparation failure without masking its test cleanup schedule or changing monitoring schemas.
Contract-Neutral: Synchronization-only snapshot repair; resource identity, API fields, alert policy and canonical ownership are unchanged.
Change-source: pulse-maintainer
pulse-triage[bot]
03dabbcdab