Static IPv6 config with cloud-init on Raspberry Pi OS

I recently had some issues with quirks relating to my IPv6-only network when trying to set up an AirPlay sink on Raspberry Pi OS. I struggled to find info relating to the IPv6-only bit specifically, so I&rsquo;ve tried to collate some of the issues I had here in the hope they&rsquo;re helpful. All of the below was done using Raspberry Pi OS Lite Trixie (Debian 13). Issues I faced New hotness…