fix: preserve lint migration contracts

scripts/run-gates.ts

@@ -376,22 +376,25 @@ function ciWindowsObservationalGates(): Gate[] {
   ]
 }
 
-function lintGate(oxlintTargets: readonly string[] = ['.']): Gate {
-  const threadArgs = oxlintThreadArgs()
-  if (threadArgs.length > 0) {
-    return pnpmExec('lint', ['oxlint', ...oxlintTargets, ...threadArgs], { label: 'lint' })
+function lintGate(): Gate {
+  const threadBound = oxlintThreadBound()
+  if (threadBound !== undefined) {
+    return pnpmExec('lint', ['oxlint', '.', `--threads=${threadBound}`], {
+      label: 'lint',
+      env: { GOMAXPROCS: threadBound },
+    })
   }
   return pnpmScript('lint', 'lint')
 }
 
-function oxlintThreadArgs(): string[] {
+function oxlintThreadBound(): string | undefined {
   const raw = process.env.DSH_OXLINT_THREADS
-  if (raw === undefined || raw === '') return []
+  if (raw === undefined || raw === '') return undefined
   const parsed = Number.parseInt(raw, 10)
   if (!Number.isSafeInteger(parsed) || parsed < 1 || String(parsed) !== raw) {
     throw new Error(`run-gates: DSH_OXLINT_THREADS must be a positive integer, got ${JSON.stringify(raw)}.`)
   }
-  return [`--threads=${raw}`]
+  return raw
 }
 
 function coverageGate(): Gate {