fix(cli): lower TEST_DEBT['@objectstack/rest'] to 155 and fix stale "Also in DEBT" note

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Fixes #6939
Fixes #7038

What

scripts/check-type-check-coverage.mjs's TEST_DEBT['@objectstack/rest'] entry carried two problems, both surfaced during #6905 (the DEBT-ledger graduation of this package):

1. [finding][devx] @objectstack/rest 的 DEBT 毕业后,TEST_DEBT 仍带 12 条余量 —— 且它现在是该包测试层唯一的看门人 #6939 — the recorded ceiling (163) sat 12 above the actual tsc count. 163 was itself a deliberate bootstrap margin (+10 over 153, per [finding] DEBT ledger counts in check-type-check-coverage.mjs drift silently — @objectstack/metadata-protocol records 28, actually reports 63 #5278 option A) meant to be tightened via the ℹ … can be lowered hint right after landing, but it never was. Since @objectstack/rest 已可零错编译,应从 #4311 的 DEBT 台账毕业 —— 加 typecheck 脚本 + 删台账条目(阻塞于 PR #6895) #6905 moved the package's src half to a real turbo run typecheck gate, this TEST_DEBT entry became the sole guard on the package's hidden test layer — the same "surplus absorbs a regression silently" shape [finding][devx] check:type-check-debt 的 ledger 余量会让新写的 pin 变哑：mongodb 曾有 33 条余量吞掉一次真实回退，另有 5 条目前带 4–19 余量 #6376 documented for driver-mongodb's 33-error margin, just smaller (12).
2. finding: TEST_DEBT['@objectstack/rest'] 的 note 仍写着 "Also in DEBT",但 #6905 已把 DEBT 条目删了 #7038 — the entry's note still read "Also in DEBT." after @objectstack/rest 已可零错编译,应从 #4311 的 DEBT 台账毕业 —— 加 typecheck 脚本 + 删台账条目(阻塞于 PR #6895) #6905 removed the corresponding DEBT block entry. That sentence became false the moment @objectstack/rest 已可零错编译,应从 #4311 的 DEBT 台账毕业 —— 加 typecheck 脚本 + 删台账条目(阻塞于 PR #6895) #6905 landed, and it misleads the next person reading the note into looking for a DEBT row that no longer exists.

What changed

• errors: 163 → errors: 155 (the exact pnpm check:type-check-debt --re-measure count on this PR's merge base, 55da611). Re-measured with a full turbo run build closure first, per the gate's own requirement.
• Rewrote the note:
  • "Also in DEBT." → "Graduated from DEBT in @objectstack/rest 已可零错编译,应从 #4311 的 DEBT 台账毕业 —— 加 typecheck 脚本 + 删台账条目(阻塞于 PR #6895) #6905." (keeps the note's historical-reading style, per finding: TEST_DEBT['@objectstack/rest'] 的 note 仍写着 "Also in DEBT",但 #6905 已把 DEBT 条目删了 #7038's own suggested wording).
  • The stale "RECORDED 163 is a bootstrap margin (+10 over 153…)" sentence now describes what actually happened: 163 stood as that margin until [finding][devx] @objectstack/rest 的 DEBT 毕业后,TEST_DEBT 仍带 12 条余量 —— 且它现在是该包测试层唯一的看门人 #6939's re-measure found the true count (155), and the entry now equals the exact measurement with no margin — so the next new error there goes red immediately, matching what --lower writes for every entry it touches ([finding] DEBT ledger counts in check-type-check-coverage.mjs drift silently — @objectstack/metadata-protocol records 28, actually reports 63 #5278 composition-drift trap, closed).

pnpm check:type-check-debt --lower itself is not scoped to a single package — running it also lowered 11 unrelated DEBT/TEST_DEBT entries in other packages (@objectstack/metadata, service-automation, service-storage, plugin-approvals, objectql, runtime, plugin-auth, mcp, lint, plugin-security, http-conformance). Those are out of this card's scope, so they were reverted; only the @objectstack/rest entry's numbers changed in the final diff.

Out of scope (per dispatch): the sibling tsconfig.test.json route (#5286-style) that would let the test layer itself be typechecked and let this TEST_DEBT entry be deleted entirely. That is a ~151-file engineering effort, not a ledger-surplus fix, and #6939 explicitly calls it out as a separate, unstarted card.

Tests / verification

Full workspace build closure first (required — the gate refuses to measure without it):

flock -w 7200 /tmp/os-heavy-verify.lock -c 'turbo run build --concurrency=2'
 Tasks:    72 successful, 72 total

Self-test (independent of the real ledger — verified the fixtures at L2076-2099 are self-contained, per the dispatch's own assumption):

node scripts/check-type-check-coverage.mjs --self-test
✓ check:type-check-coverage --self-test — 23 semantic case(s) + 16 observation case(s) + 15 re-measure case(s) + 12 built-closure case(s) + 9 auto-lowering case(s) hold.

Full re-measure after the fix — @objectstack/rest no longer appears in the ℹ … can be lowered list (dropped from 12 flagged entries to 11, all unrelated to this package):

node scripts/check-type-check-coverage.mjs --re-measure
check-type-check-coverage --re-measure: OK — 33 ledger entr(ies) re-measured in 183.9s, 1771 raw tsc error(s) total, none above its recorded number.
  surplus: 291 raw error(s) across 11 entr(ies) sit BELOW their recorded ceiling ...

node scripts/check-nul-bytes.mjs — clean.

Tooling-script-only change (scripts/check-type-check-coverage.mjs), no user-visible behavior — no changeset; requesting skip-changeset.

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Project	Deployment	Actions	Updated (UTC)
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