partysession — published to npm but has no code (empty dist/)

**Package:** `partysession@0.0.4`

The package is published to npm but has no code — `dist/` is empty. Only contains `package.json` and `README.md`.

```bash
$ npm info partysession
# published

$ ls node_modules/partysession/
package.json README.md
# no dist/ folder

$ ls node_modules/partysession/dist/
# directory does not exist
```

The README describes "Per-User State — One Durable Object instance per user" and "Session Management" but there's no implementation to use.

**Expected:** A working per-user Durable Object class for session/user state management, similar to how `partysub` provides `createPubSubServer` or `partywhen` provides `Scheduler`.

**Context:** We're testing the full PartyKit package suite against real wrangler dev with Durable Objects ([plat-trunk sync system](https://github.com/joeblew999/plat-trunk/tree/main/systems/sync)). We have working tests for partyserver, partysub, partyfn, partywhen — but can't test partysession because there's no code.