PartyKit Durable Objects with Cloudflare Free Plan

Can't use PartyKit with durable object on free plan, tried it on personal project & `todo-sync` fixture

Here's the partykit.json I created (only difference from the repo)
```
{
"name": "blah-wss-worker",
"main": "src/server/index.ts",
"compatibilityDate": "2025-11-18"
}
```

```
isaacyeang@Isaacs-MacBook-Pro todo-sync % CLOUDFLARE_ACCOUNT_ID=ABC CLOUDFLARE_API_TOKEN=XYZ npx partykit deploy --domain partykit.mydomain.com 2>&1
🎈 PartyKit v0.0.115
---------------------
Deploying...
file:///Users/isaacyeang/.npm/_npx/52b6cbf32f24ff5f/node_modules/partykit/dist/bin.mjs:96301
throw err;
^

Error: In order to use Durable Objects with a free plan, you must create a namespace using a `new_sqlite_classes` migration.
at fetchResult (file:///Users/isaacyeang/.npm/_npx/52b6cbf32f24ff5f/node_modules/partykit/dist/bin.mjs:84998:11)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at async deploy (file:///Users/isaacyeang/.npm/_npx/52b6cbf32f24ff5f/node_modules/partykit/dist/bin.mjs:95750:21)
at async _Command. (file:///Users/isaacyeang/.npm/_npx/52b6cbf32f24ff5f/node_modules/partykit/dist/bin.mjs:96391:3)

Node.js v23.6.1
Error: In order to use Durable Objects with a free plan, you must create a namespace using a `new_sqlite_classes` migration
```