refactor(core): migrate to Bun and converge acquisition policies and Agent boundaries

packages/testkit/package.json

@@ -4,5 +4,11 @@
   "type": "module",
   "exports": {
     ".": "./src/index.ts"
-  }
+  },
+  "version": "0.3.44",
+  "scripts": {
+    "test": "bun x --bun vitest run",
+    "typecheck": "bun x --bun tsc --noEmit -p tsconfig.json"
+  },
+  "dependencies": {}
 }