Merge pull request #5561 from deepseek-harness/fix/packer-agent-presets-mock

test(webworker-packer): accept the inventory agentPresets read

packages/experimental/webworker-packer/tests/image-loadable.spec.ts

@@ -314,8 +314,9 @@ const archive = async (): Promise<Uint8Array> =>
     inventory.apply({
       baseUrl,
       loader: tree,
+      // The inventory reads these optional services; this host provides none of them.
       get: (name: string): undefined => {
-        expect(name).toBe('pluginPackages')
+        expect(['pluginPackages', 'agentPresets']).toContain(name)
         return undefined
       },
       deepseekLlmApiExtensions: {