R-00374 r5: spawn Client Bot.Host; S6 ticks from ClientTimerManager

[Go1c]

R-00374 r5 · spawn Client Bot.Host; S6 ticks from ClientTimerManager (RM-00011)

• Baseline origin/main: 81fc505c9c33e6d5003af44c29d702a8b43234fe
• Head: e1b78ce9788a51a47ef4d5c3d1c776a283c110bf
• Independent deep review: 通过（无 P0 / P1；假 cadence 不成立）

Why

R-00376 live6 rust 11/11 ok:true and Playwright window 101. Game oracle failed only S6: tickSource=kernel:tickFrame, no ticks 5,10,15. R-00375 r2 BLOCKED because this suite never started Lumio.Client.Bot.Host and host-admitted 101 chats.

What

• Discover Bot.Host via LUMIO_BOT_HOST / LUMIO_CLIENT_ROOT / sibling (missing → BLOCKED).
• Spawn Lumio.Client.Bot.Host. Production ClientTimerManager drains C-4 timer_* (struct_size≥200). utteranceTicks from native drain Due. Suite copies the trace; does not write vec![5,10,15].
• Bot.Host at 780bc5c has no Room CLI; suite loads a DOTNET_STARTUP_HOOKS adapter only when LUMIO_BOT_FLEET_SPEC is set. Bare Bot.Host unchanged. Client repo not edited.

Verify (dispatcher + independent review tree)

• cargo test -p lumio-server-process --locked --test entity_chat_wire --test entity_chat_host --test entity_chat_architecture --lib → lib 89 / architecture 15 / host 13 / wire 7
• node .spec/tools/spec-lint.mjs → OK

Known gaps

• Live 11-scenario Game oracle not re-run in this PR; dispatcher rebuilds replay after merge and resumes R-00376 with LUMIO_CLIENT_ROOT.
• One Bot.Host process / 100 Room sessions (not 100 OS processes).
• R-00375 can later replace the startup hook with in-repo Room mode.