Wait for Box reconciliation in lifecycle E2E

[BrettKinny]

Summary

• wait for the raw Docker entrypoint to finish synchronous Box-tier reconciliation after create, restart, and replacement
• keep persisted-state and tmux assertions as independent correctness gates
• add a repository guard requiring all three readiness boundaries
• record the RC6 test-race correction in the v1.1.0 changelog

RC6 root cause

The replacement assertion ran immediately after docker run returned. PID 1 was still the entrypoint reinstalling the saved tmux Selection, so the assertion raced reconciliation and failed before lifecycle.recreate Evidence could be written.

Validation

• three consecutive real create, stop/start, and replacement cycles passed
• all 17 executable test modules passed
• Actionlint 1.7.12 passed
• ShellCheck 0.9.0 passed
• workflow YAML and repository consistency passed
• independent agent review found no blocking issue