Some fixes regarding startup of postgres

There were some issues with setting mount dependencies
for postgresql. Now however that is solved. What didn't work
was when the disk-mapping.json file depended on vault-agent.

As that file is not secret by any means, I moved it to /var/lib.

The only thing left to do, is to make postgresql start up
when the server is first created, and the /var/lib file
does not exist.

nix/modules/nixos/fs/zfs/services/postgresql/default.nix

@@ -51,6 +51,7 @@ in
       khscodes.fs.zfs.zpools."${cfg.pool}".datasets."${cfg.datasetName}" = cfg.datasetConfig;
       systemd.services.postgresql = {
         after = [ "khscodes-zpool-setup.service" ];
+        requires = [ "khscodes-zpool-setup.service" ];
         unitConfig = {
           RequiresMountsFor = [ cfg.datasetConfig.mountpoint ];
         };
@@ -68,7 +69,10 @@ in
           lib.lists.map (db: {
             name = "postgresqlBackup-${db}";
             value = {
-              after = [ "khscodes-zpool-setup.service" ];
+              after = [
+                "khscodes-zpool-setup.service"
+              ];
+              requires = [ "khscodes-zpool-setup.service" ];
               unitConfig = {
                 RequiresMountsFor = [ cfg.backupDatasetConfig.mountpoint ];
               };