Add session, maintenance, and backup commands

New commands:
- /summarize: Save session decisions/preferences to memory
- /maintain: Configuration maintenance (validate, backup, restore, etc.)

New automation scripts:
- backup.sh: Create timestamped config backup (excludes secrets)
- restore.sh: Restore config from backup (with validation)

Updates:
- component-registry.json: Added new commands
- commands/README.md: Updated with new entries
- automation/README.md: Documented utility scripts

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

state/component-registry.json

@@ -139,6 +139,16 @@
       "description": "Quick status overview across all domains",
       "aliases": ["/overview", "/dashboard"],
       "invokes": "command:status"
+    },
+    "/summarize": {
+      "description": "Summarize and save session to memory",
+      "aliases": ["/save-session", "/session-summary"],
+      "invokes": "command:summarize"
+    },
+    "/maintain": {
+      "description": "Configuration maintenance (backup, validate, etc.)",
+      "aliases": ["/maintenance", "/admin"],
+      "invokes": "command:maintain"
     }
   },
   "agents": {