fix: ci, reduce to x86_64-linux arch only, bump RAM to avoid oom

Author: johnalotoski

flake.nix

@@ -59,6 +59,7 @@
   } @ inputs:
     std.growOn {
       inherit inputs;
+      systems = ["x86_64-linux"];
       cellsFrom = nix/cells;
       cellBlocks = [
         (std.functions "library")

nix/cells/automation/pipelines.nix

@@ -27,7 +27,7 @@
       skippedDescription = lib.escapeShellArg "No nix builder for this system";
     };
 
-    memory = 1024 * 8;
+    memory = 1024 * 16;
     nomad.resources.cpu = 10000;
   };
 }