feat: Add little-rascal laptop config and lab-tool auto-update system

## New Machine: little-rascal
- Add Lenovo Yoga Slim 7 14ARE05 configuration (AMD Ryzen 7 4700U)
- Niri desktop with CLI login (greetd + tuigreet)
- zram swap configuration (25% of RAM with zstd)
- AMD-optimized hardware support and power management
- Based on congenital-optimist structure with laptop-specific additions

## Lab Tool Auto-Update System
- Implement Guile Scheme auto-update module (lab/auto-update.scm)
- Add health checks, logging, and safety features
- Integrate with existing deployment and machine management
- Update main CLI with auto-update and auto-update-status commands
- Create NixOS service module for automated updates
- Document complete implementation in simple-auto-update-plan.md

## MCP Integration
- Configure Task Master AI and Context7 MCP servers
- Set up local Ollama integration for AI processing
- Add proper environment configuration for existing models

## Infrastructure Updates
- Add little-rascal to flake.nix with deploy-rs support
- Fix common user configuration issues
- Create missing emacs.nix module
- Update package integrations

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/lab-tool/main.scm

@@ -13,7 +13,8 @@
              (utils logging)
              (lab core)
              (lab machines)
-             (lab deployment))
+             (lab deployment)
+             (lab auto-update))
 
 ;; Initialize logging
 (set-log-level! 'info)
@@ -32,6 +33,8 @@ COMMANDS:
                       Available modes: boot (default), test, switch
   deploy-all          Deploy to all machines
   update              Update flake inputs
+  auto-update         Perform automatic system update with health checks
+  auto-update-status  Show auto-update service status and logs
   health [machine]    Check machine health (all if no machine specified)
   ssh <machine>       SSH to machine
   test-modules        Test modular implementation
@@ -45,6 +48,8 @@ EXAMPLES:
   lab deploy congenital-optimist test     # Deploy temporarily for testing
   lab deploy-all
   lab update
+  lab auto-update                         # Perform automatic update with reboot
+  lab auto-update-status                  # Show auto-update logs and status
   lab health
   lab health sleeper-service
   lab ssh sleeper-service
@@ -202,6 +207,18 @@ Home lab root: ~a
                         (format #t "  ~a: ~a\n" machine status)))
                     results)))))
 
+(define (cmd-auto-update)
+  "Perform automatic system update"
+  (log-info "Starting automatic system update...")
+  (let ((result (auto-update-system '((auto-reboot . #t)))))
+    (if result
+        (log-success "Automatic update completed successfully")
+        (log-error "Automatic update failed"))))
+
+(define (cmd-auto-update-status)
+  "Show auto-update status and logs"
+  (auto-update-status))
+
 ;; Main command dispatcher
 (define (dispatch-command command args)
   "Dispatch command with appropriate handler"
@@ -228,6 +245,12 @@ Home lab root: ~a
     ('update
      (cmd-update))
     
+    ('auto-update
+     (cmd-auto-update))
+    
+    ('auto-update-status
+     (cmd-auto-update-status))
+    
     ('health
      (cmd-health args))