feat: Add deploy-rs integration with basic configuration

- Add deploy-rs as flake input
- Configure deploy.nodes for all 4 machines (sleeper-service, grey-area, reverse-proxy, congenital-optimist)
- Include safety features: autoRollback, magicRollback, activation timeouts
- Add deploy-rs checks for validation
- Successfully tested dry-run deployment

This completes Tasks 1-3 from the deploy-rs integration roadmap.

packages/default.nix

@@ -1,14 +1,12 @@
-{ pkgs ? import <nixpkgs> { } }:
-
-{
+{pkgs ? import <nixpkgs> {}}: {
   # Custom packages for Home-lab infrastructure
-  
+
   # Home-lab administration command-line tool
-  lab = pkgs.callPackage ./home-lab-tools.nix { };
-  
+  lab = pkgs.callPackage ./home-lab-tools.nix {};
+
   # Claude Task Master AI package
-  claude-task-master-ai = pkgs.callPackage ./claude-task-master-ai.nix { };
-  
+  claude-task-master-ai = pkgs.callPackage ./claude-task-master-ai.nix {};
+
   # Re-export commonly used packages with custom configurations
   # (Basic CLI tools moved to base.nix)
-}
+}