`memory status` always appended "Fix: openclaw memory status --fix"
when any audit issue was present, even when none of the issues were
actually repaired by --fix. A missing qmd index file (qmd-index-missing)
is marked fixable: false, so running the suggested --fix left the
issue unresolved. Gate the --fix hint on at least one fixable issue,
and suggest `openclaw memory index --agent <id>` (which builds a fresh
index) when the qmd index file is missing.