add persist subvol

devices/inkvine/disko.nix

@@ -37,6 +37,10 @@
                       mountpoint = "/nix";
                       mountOptions = [ "compress=zstd" "noatime" ];
                     };
+                    "/persist" = {
+                      mountpoint = "/persist";
+                      mountOptions = [ "compress=zstd" "noatime" ];
+                    };
                     "/swap" = {
                       mountpoint = "/.swapvol";
                       swap.swapfile.size = "8G";