Stop scope retries after shell access denial

[Aaronontheweb]

Summary

• Stop inherited guidance from treating a terminal access denial as a scope correction.
• Preserve one unchanged retry only for a deferred shell result.
• Lock sanitized live evidence and the same-model 15-run result.

Validation

• Release build: 0 warnings and 0 errors.
• Full tests: 7,532 passed with 15 expected skips.
• Focused prompt tests: 24 passed.
• Focused evidence and PII tests: 73 passed.
• DeepSeek evals: 15 of 15 behavior passes.
• Strict OpenSpec, headers, JSON, Bash syntax, diff, and changed-file format checks passed.
• Slopwatch found only the unchanged timeout-test warning from 8682049.

[Aaronontheweb]

Ubuntu exposed an unrelated startup-order race in ReminderManagerActorTests: ActorOf can return before PreStart queues its self-reconcile, so one Ask was not a deterministic startup barrier.

The test-only correction uses two ordered reconcile barriers, matching the established actor-start ordering. No assertion or production behavior was relaxed. Validation: four affected tests 4/4, target test 30/30 repeated, full Actors suite 3,430 passed with one expected Windows-only skip, formatting/headers/diff check clean, and Slopwatch reports only the unchanged pre-existing SW004 in PowerShellHostProbeTests.cs:311.