=== PART 3 step 4 — POSITIVE CONTROL: stop a different app OUT-OF-BAND so it is a genuine fault
   (docker stop leaves the container present -> StateExited, which the code says still alerts;
    a compose-down user stop would be StateStopped, which is whitelisted by design)
   privatebin stopped out-of-band
   at: 21:14:18Z
