chore(release): clear release/v3.8.51 base-red gates — docs count, stryker list, lockfile host, stale suppressions, 7 lint regressions

[MumuTW]

Part of #11449. Every fix here reproduces on the pristine release/v3.8.51 tip with no other changes, and none alters runtime behaviour.

What turns green

check	cause on base	fix
Docs Gates (check:fabricated-docs strict drift)	README.md / AGENTS.md / llm.txt say "159 migrations", code has 160	count updated in the three root docs and the 38 strict i18n llm.txt mirrors (check:docs-sync requires byte-identical bodies, so root-only edits red it)
Fast Quality Gates → check:mutation-test-coverage --strict	tests/unit/repro-combo-persisted-cooldown-preskip.test.ts and tests/unit/repro-glm-iso-reset-24h-cap.test.ts cover mutated modules but are absent from stryker.conf.json tap.testFiles	both added, in place
Fast Quality Gates → check:lockfile	libxmljs2/node_modules/brace-expansion resolved from registry.npmmirror.com	host → registry.npmjs.org; same tarball, same integrity hash
No new ESLint warnings (exit 2, before any lint result)	two stale entries in config/quality/eslint-suppressions.json (videoBridgeContactSheet.ts, videoBridgeRuntime.ts)	eslint --prune-suppressions
No new ESLint warnings (275 errors, visible only once exit 2 is gone)	#11434 orphaned windowStillExhaustedAfterRealReset() + 3 imports in providerLimits.ts and 1 import in videoBridge.ts; #11390's new test added an unused payload and two as any, taking combo-routing-engine.test.ts to 269 vs a 267 bulk-suppression quota (all-or-nothing → all 269 surface)	orphaned code deleted (zero references); relayOptions already satisfies ComboRelayOptions, cast dropped; file back at exactly 267
Unit fast-path → providers-constants-split.test.ts	#11434 added volcengine-agent-plan + volcengine-coding-plan (regional) without bumping the hard-coded partition count	assertion 231 → 233 (233 keys, 233 distinct, family sum 233); history comment extended in the file's own style
Build (advisory) + hook typecheck + live-ws-url-11331.test.ts	#11388 (merged 08-24) added sanitizeLiveWsPort / resolveLiveWsUrl to wsPath.ts and wired them into useLiveDashboard.ts; the next day's #11434 carried a competing #11331 fix whose wsPath.ts overwrote that hunk while hook + test kept the imports → TS2305, red test, Turbopack "Export resolveLiveWsUrl doesn't exist"	the two functions re-added verbatim beside the surviving resolveLiveWsPublicUrl; 11/11, tsc clean
Vitest (fast-path) → glmCodingProviderConfig.test.ts	registry ships glm-5.3-max with a max tier; Z.AI's GLM-5.3 reference documents reasoning_effort ∈ {low, high, max} (max recommended for coding), so the test's inventory/tier tables were stale	glm-5.3-max + ["max"] added; 10/10
check:open-sse-typecheck	catalog.ts:1614,1648 — `!modelType

Verification (local, this branch)

npm run check:docs-sync                 → PASS, 42 locales match
npm run check:mutation-test-coverage    → ✓ No drift
npm run check:lockfile                  → OK, no issues
npm run lint:json -- --max-warnings 0   → exit 0
npm run typecheck:core                  → clean
node --test tests/unit/combo-routing-engine.test.ts   → 91/91
node --test <12 unit files importing providerLimits / videoBridge> → 73/73
node --test tests/unit/providers-constants-split.test.ts → 4/4

Deliberately NOT touched (need the owning author's judgement)

• Unit fast-path shards — the 14 test files behind the remaining ✖ lines were run on the pristine base tip 6435f618f4 and on this PR's tip b4bb5ba8bb with identical results: 100 tests, 19 failures, the same 19 on both (A2A agent-card skill count ×5, conductor agent-card ×2, provider-nodes CC mode ×2, postExchange onboarding ×4, openapi coverage floor, route-body Zod t06, pack-artifact closures, hard-lease inventory, translate-path golden, minimax-m3 ledger, Claude/GLM quota recovery ×2). Three names that show only on CI (buildWeeklyQuotaFallback…, checkFallbackError… GLM 429, Antigravity BYOP…) pass locally on both trees — timing flakes, not regressions.

Those are listed on #11449 with reproduction notes.