[dmoliveira]

Summary

• take the loop execution lock before mutating persisted configuration
• make execution-first config saves fail unchanged instead of racing startup admission
• preserve update-first scheduled drafts and execution→mutation lock ordering

Validation

• deterministic startup race: 20/20 repetitions
• Python 3.11 selected config/scheduled/restart tests: 13 passed
• full suite: 507 passed, 85% coverage
• Ruff, format, compile, and diff checks passed
• independent verifier PASS; final concurrency review GO

Runtime-Session: ses_057afdc3effemiOJ2zfmjJiDqe