fix: mark driver packages as external in runtime build config

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Claude

packages/runtime/package.json

@@ -14,7 +14,7 @@
     }
   },
   "scripts": {
-    "build": "tsup --config ../../tsup.config.ts",
+    "build": "tsup --config tsup.config.ts",
     "dev": "tsc -w",
     "test": "vitest run"
   },

packages/runtime/tsup.config.ts

@@ -0,0 +1,19 @@
+// Copyright (c) 2025 ObjectStack. Licensed under the Apache-2.0 license.
+
+import { defineConfig } from 'tsup';
+
+export default defineConfig({
+  entry: ['src/index.ts'],
+  splitting: false,
+  sourcemap: true,
+  clean: true,
+  dts: true,
+  format: ['esm', 'cjs'],
+  target: 'es2020',
+  // Mark driver packages as external so they are resolved at runtime, not bundled
+  external: [
+    '@objectstack/driver-memory',
+    '@objectstack/driver-sql',
+    '@objectstack/driver-turso',
+  ],
+});