R-00374 r3: pace chat ticks so Room Delta emits chat.event

[Go1c]

R-00374 r3 · Room wire emits chat.event (RM-00011)

• Baseline origin/main: 17111ce88a393e181fdae73b7873e461b85e51d9
• Head: 36f72bb87f8deb0984f417da2a2ab60c44598214
• Independent deep review r3b: 通过（r3 退回 P0/P1 已闭合）

Why

R-00376 live3 loaded C-4 native struct_size=200 then received {"messageType":"Delta","tickId":1,"revision":1,"changedBlocks":[]}. 101 chat.inputs in one RunTick exceed Runtime MaxChangeEntries=128 (2 field writes each). Runtime _faulted; BuildDelta empty; S8 AttachMember failed.

What

• Suite paces kernel ticks at 64 inputs (MAX_CHAT_INPUTS_PER_TICK).
• Over-budget tick is ok:false; host does not broadcast empty Delta.
• S8 connects c-bot100 as RoomClient and recvs ConnectionSuperseded (not host takeover).
• S7 does not mark ok with empty snapshot / processB=null.

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 86 / architecture 6 / host 11 / wire 5
• node .spec/tools/spec-lint.mjs → OK

Known gaps

• 101-entity persist still Runtime-blocked (ChatIngressWorld MaxSnapshotBytes=4096). S7 stays not-ok until Runtime budget covers 101 entities. Not encoded as SUCCESS.
• Live 11-scenario Game oracle not re-run in this PR; dispatcher rebuilds replay after merge and resumes R-00376.