Auto-scan every inbound file for malware. Installs one reactive recipe that fires on data.file.received.*.created — an inbound reception drop, messenger media, or mail attachment — runs the ClamAV pack's file.scan over the bytes, and writes the verdict (clean / flagged) back to the record's scan_status. This sharpens the reception attachment scan-gate (D-173 P5): a flagged upload surfaces a stronger warning when the reviewer approves the held request, while a clean one clears the advisory. Depends on the ClamAV capability pack (clamav-pack), which carries the cli scan op and the clamd setup docs; install both and run a local clamd. A scan error (clamd down) leaves the file unscanned and the advisory gate still warns — nothing is silently approved. After install, the default dish runs on every inbound file; no per-file configuration.