The collection update endpoints (post_collections_update and
post_collections_admin) call .unwrap() on cipher.organization_uuid
in four places. If a user-owned cipher without an organization
somehow reaches these code paths, the server would panic.
Extract the organization UUID early with a descriptive error message
instead of relying on .unwrap(), preventing potential panics and
providing a clear API error response.
Co-authored-by: Daniel García <dani-garcia@users.noreply.github.com>
