Raff v1.5.2: Reinstall OS, billing, and refund accuracy

Reinstall no longer touches your addresses, and every money path (refunds, deletions, email changes) now settles exactly.

Fixed

Reinstall OS keeps your public IP. Reinstalling a VM's OS no longer detaches and re-attaches the public IP.

Reinstall OS keeps your IPv6. The IPv6 address is preserved through the reinstall.

Pro-rata refunds are accurate. Refunds now credit to the hour instead of rounding to the start of the day.

Account deletion is safe. Deleting an account with an active subscription now tells you exactly what to clean up first.

Email changes propagate everywhere. Invoices and payment emails follow the new address.