Add git-based auto-update for Linux deployment

- install.sh now clones from git instead of copying files
- Service runs git pull on restart for automatic updates
- Support config.local.json for production settings (gitignored)
- kao.py prefers config.local.json when present

To update production: push changes, then 'sudo systemctl restart kao'

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

kao.py

@@ -242,10 +242,18 @@ def main():
         else:
             config_path = sys.argv[1]
 
-    # Resolve config path
+    # Resolve config path - prefer config.local.json if it exists
+    base_dir = Path(__file__).parent
     config_path = Path(config_path)
+
     if not config_path.is_absolute():
-        config_path = Path(__file__).parent / config_path
+        # Check for local config override first
+        local_config = base_dir / "config.local.json"
+        if local_config.exists() and config_path.name == "config.json":
+            config_path = local_config
+            print(f"Using local config: {config_path}")
+        else:
+            config_path = base_dir / config_path
 
     if not config_path.exists():
         print(f"Config file not found: {config_path}")