Heartbeat

Heartbeat function between Speedcontrol and ESAController to pause the timer in the former if there's a loss of contact between the two (for example a reboot of jetengine) or a loss of internet connection to jetengine

Start by tracing the communication entry points between Speedcontrol and ESAController, including how either side detects contact with jetengine. Define the heartbeat behavior for a jetengine reboot or lost internet connection, including how Speedcontrol pauses and resumes its timer. No files or tests are identified in the issue, so the relevant implementation and validation paths must be located first.

Written by the indexing model from the issue text.