Harden scheduler switch guards

[Pigbibi]

Summary

• make heartbeat named scheduler fallback handle service-name aliases
• derive runtime guard scheduler filters from configured services when no explicit pattern is set
• add targeted tests for scheduler alias handling

Tests

• python -m pytest tests/test_execution_report_heartbeat.py tests/test_cloud_run_runtime_guard.py
• git diff --check

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Anchor derived scheduler aliases

When RUNTIME_GUARD_SCHEDULER_JOB_PATTERN is unset, adding the stripped alias as a bare regex alternative makes the runtime guard match sibling jobs that only share the prefix. For example, with configured service longbridge-quant-hk-service, the generated longbridge\-quant\-hk alternative also matches longbridge-quant-hk-verify-service-scheduler, so a failure in that separate scheduler job would be reported against this guard run. Please constrain the generated alternatives to the intended scheduler job names or boundaries.

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