Home Assistant MCP Server: YAML config backups written under www/ are served unauthenticated at /local/

Summary When ENABLEYAMLCONFIGEDITING=true, every haconfigsetyaml call backs up the pre-edit file to /www/yamlbackups/, which Home Assistant serves at /local/ with no authentication. Anyone who can reach the HA web interface can download the most recent pre-edit configuration.yaml or other YAML fi...