docs(pm-dispatch): one patrol routine per seat, not per project (#28739)

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_Requested by **田騏** · [project
thread](https://claude.ai/code/project/chan_01VmuUhXU9SSUzqJYyXSmYSi?thread=cmsg_01VmuUhXU9SSUzqJYyXSmYSiHXKqxUqDPJKZyNHP7BoqTb)_

Fixes #28699
Clause-②: no
Metadata-protocol: none

## 维护者速读

- 改了什么:pm-dispatch `SKILL.md` 第 72 行把项目席巡查 routine
的单位从「每项目一个」改成「每席一个」,其余一字不动,净行数 0。
- 为什么改:`SKILL.md` 与 `seat-lifecycle.md`、`project-forms.md`
自相矛盾;一个项目坐多条车道时,实际做法是每个席位线程各绑一个巡查,因为每席是各自的会话。
- 风险与回滚:只改规则文字,无代码;不改的风险是读者照旧句只给项目建一个巡查,其它席位醒不来。回滚 = revert 本 commit。
- 先看:`.claude/skills/pm-dispatch/SKILL.md` 第 72 行(唯一改动)。
- 两分钟验证:`git grep -n 每项目一个 -- .claude/skills` 预期零命中,`pnpm
check:pm-skill-ratchet` 预期绿。
- 需要你做的:用授权账号批准本 PR(受管面上的规则改动),随后由席位落地。

## What changes

`.claude/skills/pm-dispatch/SKILL.md` line 72, the project-seat wake
line, now names the seat as the unit of the self-bound patrol routine:
「每项目一个」 becomes 「每席一个」. The director-seat exception and the rest of the
line are unchanged. `SKILL.md` stays at 319 lines (net 0).

This matches the references on `main` after #28687:
`references/seat-lifecycle.md` (taking a seat creates the routine and
records `Patrol:` on that seat's stub) and `references/project-forms.md`
(「坐席即建巡查 routine」, one seat thread per seat).

## Tests

No code changed, so there are no unit tests. Verification is the gate
families derived from the diff (below).

## Acceptance notes

- Wording: the card asks for "one routine per seat thread". 「每席位线程一个」
would put the line at 124 bytes, over the 120-byte cap that `pnpm
check:pm-skill-ratchet` enforces. 「每席一个」 is 115 bytes and reads
unambiguously, because the line before it defines a project seat as a
project thread (「会话是车队项目的线程」). It also matches `project-forms.md`'s
「每席开一条席位线程」.
- No other file restates this unit: `git grep -n 每项目一个` exits 1 on this
head (control: `git grep -n 自建自绑巡查` finds line 72).
- Governed surface (`.claude/**`): this PR stays draft and waits for its
tier's record.

## Verification

Head `ba301e3691`. Gate list from `node scripts/pm/dispatch-gates.mjs
--commands --repo objectstack-ai/objectstack` (20 families, 1 path,
+1/-1). Exit codes were captured before any pipe.

<details><summary>Derived gates: 20/20 exit 0</summary>

```
0  node scripts/check-closing-keyword-parity.mjs
0  node scripts/check-closing-keyword-parity.mjs --self-test
0  node scripts/check-comment-mask-corpus.mjs
0  node scripts/pm/check-governed-queue-guard.mjs --self-test
0  node scripts/pm/check-harness-current.mjs --self-test
0  pnpm --filter @objectstack/lint run check:doc-formula-expressions   (first run exit 3 PREREQUISITE NOT MET; rerun after building formula+lint)
0  pnpm check:agent-test-spelling
0  pnpm check:cross-package-test-inputs
0  pnpm check:doc-authoring
0  pnpm check:driver-memory-census
0  pnpm check:gitlink-declared
0  pnpm check:nul-bytes
0  pnpm check:pm-expected-skips
0  pnpm check:pm-governed-merges
0  pnpm check:pm-governed-prose
0  pnpm check:pm-skill-id-lint
0  pnpm check:pm-skill-ratchet
0  pnpm check:refd-timer-probe
0  pnpm check:skill-frame-sync
0  pnpm check:watch-hint-literal
```

`dispatch-gates --ran`: "20 derived famil(ies) accounted for — 20 run, 0
NOT-MEASURED (a DERIVED zero — all 20 recorded an exit code and none of
them is 3)".

</details>

<details><summary>Named gate verdict lines</summary>

```
✓ check-governed-prose: 2 instruction surface(s) name all 13 registered governed surfaces that govern objectstack ... and claim no others.
✓ check-skill-id-lint: 106 file(s) clean (pattern /#[0-9]{3,}/g).
✓ check-skill-line-ratchet: declared cross-file moves: 3, total ceilings down 494 lines.
✓ check-skill-frame-sync: the one declared copy of the decision frame is internally coherent (.claude/skills/pm-dispatch/SKILL.md; ...)
```

</details>

Session: `session_017ihL2g7RyXa8ErM6GAkHyc` (seat `domain:skills#2`).

---
🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

Author: objectstack-fleet[bot]

.claude/skills/pm-dispatch/SKILL.md

@@ -69,7 +69,7 @@ PM 的工作是循环:选卡 → 认领 → 派发 → 收集 → 复核 → 报
 - 批 = 一个上下文里读完的 ≤5 张同族卡,是质量单位,⛔ 不是预算。
 - 班 = 一个会话的任期,只以交接或惰性回收结束。
 - 席位两形:Routine 席与项目席(会话是车队项目的线程);细则见 `references/seat-lifecycle.md`。
-- 项目席唤醒 = PR 订阅 + 每项目一个自建自绑巡查 routine(总监席除外);⛔ 无 `send_later` 链。
+- 项目席唤醒 = PR 订阅 + 每席一个自建自绑巡查 routine(总监席除外);⛔ 无 `send_later` 链。
 - 探针先行:fire 的第一动作是一次最便宜的车道盘点查询,⛔ 在它之前不读任何长文本。
 - 队列空 + 无在飞 + 无待复核 + 决策箱无新答复 ⇒ 自退。
 - 分诊席与车道席常驻,断粮即换账号重开该席与信箱;分诊席默认判断档;裁决归总监席。