[55] [C#-CHARACTER.2] Logout is always instant; C++ can deny/delay/countdown

[alseif0x]

Logout request completes an instant logout always. C++ may deny, respond delayed, and start a countdown with root/stun.
C++: Handlers/CharacterHandler.cpp (HandleLogoutRequest), Player.cpp logout flow. Relates to M5.5 (#45).

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From the C#-vs-C++ reference audit (local docs/audits/csharp-reference-contrast.md). Plan: docs/migration/PORT_PLAN.md (L26) · State: docs/migration/STATE.md.
Done = contrast Rust vs the cited C++; if it matches, re-anchor the comment to C++ file:line; if it differs, fix behavior to C++. Live + capture-clean. 1 issue = 1 PR.