chore: improve code formatting and configuration across multiple files

The diff shows comprehensive code cleanup and formatting improvements across 18 files, including cleaner argument structures, additional package configurations, and improved formatting in the `home/terminal/software/git.nix` hook script.

servers/hetzner/hosts/hetzner/default.nix

@@ -22,5 +22,11 @@
     ../../modules/services/backup.nix
   ];
 
+  # Only 4GB RAM — limit nix builds to one core at a time to avoid OOM
+  nix.settings = {
+    cores = 1;
+    max-jobs = 1;
+  };
+
   system.stateVersion = "24.05";
 }

servers/hetzner/hosts/hetzner/hardware.nix

@@ -17,7 +17,7 @@
   swapDevices = [
     {
       device = "/swap";
-      size = 2048;
+      size = 8192;
     }
   ];