Separate website releases share one upload allowance

Our separate website releases compete for the same upload allowance, even when they're for different projects.

Vercel counts uploads across the account, so each project's release draws from a budget the other projects also need. An unpacked release makes one upload request per file, making the number of files matter across releases.

We set our release command to send each already-built website as a single compressed archive.

<caption>Separate releases drew on the same upload allowance, so we changed each release to send one packed archive.</caption>

#dev