Add Redis heartbeat liveness probe so pubsub subscribers self-recover… #86

Job	Run time
build-binaries (windows-latest, kvaser-bridge-windows, kvaser-bridge-windows.exe)	1m 15s
build-binaries (macos-latest, kvaser-bridge-macos, kvaser-bridge-macos.app.zip)	24s
publish-rolling-release	15s
attach-release-assets	0s
	1m 54s

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