nix: working-droidspaces-rootfs-minimal, Update journald configuration (#309)

Refactor journald configuration to use settings object.

Author: betaksu

nix/nixos.nix

@@ -110,15 +110,15 @@
         };
 
         # Journald configuration (skip Audit, KMsg, etc)
-        services.journald.extraConfig = ''
-          ReadKMsg=no
-          Audit=no
-          Storage=volatile
-          SystemMaxUse=50M
-          RuntimeMaxUse=10M
-          MaxRetentionSec=7day
-          MaxLevelStore=info
-        '';
+        services.journald.settings.Journal = {
+          ReadKMsg="no";
+          Audit="no";
+          Storage="volatile";
+          SystemMaxUse="50M";
+          RuntimeMaxUse="10M";
+          MaxRetentionSec="7day";
+          MaxLevelStore="info";
+        };
 
         services.logrotate.settings.header.maxsize = "50M";