`create_project_zip` only wrapped the ZIP write, so an `OSError` while
staging files or creating the temporary archive escaped as a bare
`OSError` and the deploy command recorded it as `unexpected` instead of
`zip_error`. The archive boundary now covers staging, temp-file creation
and the write; the staging directory is removed on every path, and no
partial archive is left behind.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>