[Bug]: early access organization creation failed, org slug is now unavailable.

### Problem description

Last night (CEST) time I tried to create an early access organization with a very specific name. I was accessing https://app.deno.com/orgs/new to create it and the moment I pressed create organization, I received a 500 error from the server. Today I was trying to create it again, but the name is not available anymore. Did someone register that very specific name? (possible, but unlikely) or Ddeno deploy didn't assign the org to my account because of the system error? (I don't see that new org under my orgs)

### Steps to reproduce

1. Click to create new early access org
2. Fill in the details of my org
3. Create organization
4. Receiving error from server

### Expected behavior

The new org is created and assigned to my account under orgs.

### Environment

_No response_

### Possible solution

_No response_

### Additional context

My github account used to login to deno deploy: giovanni-d
I don't want to share the name of the org that I created here, is there a way to do this securely so you guys can check it for me?

Start by reproducing the organization creation flow at https://app.deno.com/orgs/new with the reported steps, then inspect the server-side request and organization records for the affected account. Check whether the failed request reserved the slug without creating or assigning the organization; done means the failure is explained and the slug and account state are corrected or a safe recovery path is provided.

Written by the indexing model from the issue text.