[ejgallego]

This PR lets the helper-lifetime fixture read a complete Windows PID receipt while its publisher still holds the rename handle. The fixture reader allows delete sharing, which the standard C runtime reader omits, while preserving genuine access failures and the existing readiness checks.

• Keep receipt publication, cancellation and lifetime assertions unchanged; close every owned read handle and propagate errors without retries.
• Exercise a held DELETE-access handle, denied read sharing and handle cleanup through the existing fast and native qualification entry points.