Reporter task counts consecutive heartbeat failures from the bool
returned by reporter_heartbeat (Task 5). After 6 consecutive misses
(~6 hours at the hourly cadence) the device logs EVT_HEARTBEAT_MISS
then EVT_REBOOT(REBOOT_HEARTBEAT_MISS) and restarts, giving the whole
network stack a clean reinitialization. The 200ms delay before the
restart lets NVS commit the REBOOT entry so the next boot can report
it via EVT_BOOT + esp_reset_reason().
Peter Woolery
f08f70a8fb