chore: resync PR #9673 with latest release/v3.8.50 base

Merge remote-tracking branch 'origin/release/v3.8.50' into feat/9530-forgotten-sibling-tests-gate

scripts/check/check-db-rules.mjs

@@ -63,6 +63,7 @@ export const INTENTIONALLY_INTERNAL = new Set([
   "optimizationSettings", // db-internal: imported by db/core.ts for SQLite PRAGMA application helpers that require the live adapter
   "pluginMetrics", // DEAD? (production): write path não foi conectado ainda (documentado no cabeçalho do módulo); testado por tests/unit/plugins-metrics.test.ts
   "prompts", // DEAD? (production): zero callers de produção encontrados; domínio domain/prompts.ts é independente; testado por tests/integration/proxy-pipeline.test.ts
+  "probeUtils", // db-internal: importado so por db/core.ts (retryProbeIfTransient no caminho da corruption-probe, #9541); testado por tests/unit/probe-9541-repro.test.ts
   "providerNodeSelect", // db-internal: importado só por db/providers.ts (selectProviderNodeForConnection — lógica pura de seleção de provider node split do providers.ts, #4421)
   "providerStats", // intentionally-internal: src/app/api/provider-stats/route.ts
   "proxyLatency", // intentionally-internal: imported directly by src/lib/db/proxies.ts (anti-barrel, #6798)

scripts/check/check-test-discovery.mjs

@@ -107,6 +107,11 @@ export const COLLECTORS = [
     glob: "open-sse/services/__tests__/antigravity-quota-family.test.ts",
     sources: ["vitest.mcp.config.ts"],
   },
+  // #8890 landed this suite here without wiring a runner, so it had never run once.
+  {
+    glob: "open-sse/services/__tests__/fail-fast-concurrency-gate.test.ts",
+    sources: ["vitest.mcp.config.ts"],
+  },
   { glob: "tests/unit/autoCombo/**/*.test.ts", sources: ["vitest.mcp.config.ts"] },
   { glob: "src/lib/memory/__tests__/generic-backend.test.ts", sources: ["vitest.mcp.config.ts"] },
   { glob: "tests/unit/encryption.spec.ts", sources: ["vitest.mcp.config.ts"] },