machines/sirius: use f2fs file system

machines/sirius/configuration.nix

@@ -17,4 +17,20 @@
 
   system.stateVersion = "25.11";
 
+  services.journald.extraConfig = ''
+    Storage=volatile
+    RuntimeMaxUse=30M
+    RuntimeMaxFileSize=10M
+  '';
+
+  services.udisks2.enable = false;
+
+  nix.settings.log-lines = 25;
+  nix.settings.auto-optimise-store = true;
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 15d";
+  };
+
 }