The counter reset after NM restart already fully prevents the SSH-lockout
cascade: _disconnected_checks can never accumulate across NM restarts
because it is reset to 0 before the next daemon iteration runs.
The 3→6 increase provided no additional fix for the described problem and
caused a UX regression: fresh Pi devices with no WiFi configured would
wait 3 minutes instead of 90 seconds for the LEDMatrix-Setup hotspot to
appear.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>