feat(blob): create website-blob store under Ocobo team account

[wab]

Parent

#32

What to build

Create the new Vercel Blob store under the Ocobo team account, retrieve its credentials, prepare local environment for the migration step.

Steps:

1. Run vercel blob create-store website-blob --scope ocobo-22231b32 to create the store under the Ocobo team.
2. Retrieve the BLOB_READ_WRITE_TOKEN for the new store.
3. Add it to posts/.env.local as NEW_BLOB_READ_WRITE_TOKEN (preserving the existing BLOB_READ_WRITE_TOKEN for the old store until cutover).
4. Capture the new store's public hostname (e.g. <new-id>.public.blob.vercel-storage.com) — needed by the migration and frontmatter-rewrite issues.

This is a HITL step — manual CLI commands, no code to commit. Confirm in PR / issue comment what was created.

Acceptance criteria

• website-blob store exists under Ocobo team scope (ocobo-22231b32), visible in team dashboard
• NEW_BLOB_READ_WRITE_TOKEN present in posts/.env.local
• New store hostname captured and noted in this issue's comments (needed by downstream issues)

Blocked by

• feat(assets): review and delete orphan files from posts/assets/ #34