paperless and postgresql get a synchronized dataset.

nixos/machines/chungus/disko-syncoid.nix

@@ -4,9 +4,18 @@
     enable = true;
     commands.service2 = {
       source = "zroot/services2";
-      target = "zraid/mirror/services2";
+      target = "zraid/mirror/services2"; # needs to be created but not named in disko-config.nix
+    };
+    commands.paperless = {
+      source = "zroot/paperless";
+      target = "zraid/mirror/paperless"; # needs to be created but not named in disko-config.nix
+    };
+    commands.postgresql = {
+      source = "zroot/postgresql";
+      target = "zraid/mirror/postgresql"; # needs to be created but not named in disko-config.nix
     };
     commonArgs = [
+      # Does not create new snapshot, only transfers existing
       "--no-sync-snap"
     ];
   };

nixos/machines/chungus/hardware-configuration/disko-config.nix

@@ -105,6 +105,24 @@ in
               "com.sun:auto-snapshot:daily" = toString true;
             };
           };
+          "paperless" = {
+            type = "zfs_fs";
+            mountpoint = "/var/lib/paperless";
+            options = {
+              mountpoint = "legacy";
+              compression = "lz4";
+              "com.sun:auto-snapshot:daily" = toString true;
+            };
+          };
+          "postgresql" = {
+            type = "zfs_fs";
+            mountpoint = "/var/lib/postgresql";
+            options = {
+              mountpoint = "legacy";
+              compression = "lz4";
+              "com.sun:auto-snapshot:daily" = toString true;
+            };
+          };
         };
       };