fix(python-runtime): fall back to node-pty prebuild

scripts/build-exe-for-python-sdk-native-pty.ts

@@ -0,0 +1,23 @@
+/** Resolve the native node-pty input used by the Python SDK runtime builder. */
+
+import { existsSync } from 'node:fs'
+import { join } from 'node:path'
+
+/**
+ * Prefer the workflow's manylinux build and fall back to node-pty's target prebuild.
+ * @param packageDirectory - installed node-pty package directory.
+ * @param arch - Linux target architecture.
+ * @returns the existing addon path.
+ */
+export function resolveLinuxNodePtyAddon(
+  packageDirectory: string,
+  arch: 'x64' | 'arm64',
+): string {
+  const built = join(packageDirectory, 'build', 'Release', 'pty.node')
+  if (existsSync(built)) return built
+  const prebuilt = join(packageDirectory, 'prebuilds', `linux-${arch}`, 'pty.node')
+  if (existsSync(prebuilt)) return prebuilt
+  throw new Error(
+    `build-exe-for-python-sdk: node-pty addon is absent from both ${built} and ${prebuilt}.`,
+  )
+}