Adds bee-autoaudit.service: after the boot-time bee-web/bee-audit/
bee-preflight/bee-network units settle, it waits for bee-web to answer
/healthz and then POSTs to the same /api/audit/run endpoint the "Run Audit"
button uses. An operator opening the web UI right after boot now finds a
completed Audit task (report + charts) waiting instead of an empty task
history. Best-effort: any failure just falls back to the manual button.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
