Treat Home Assistant state_reported keepalives as liveness signals #686

Job	Run time
lint	19s
validate (3.13)	52s
validate (3.10)	48s
validate (3.11)	45s
validate (3.12)	45s
build-addon (linux/arm64, addon-linux-arm64) / build	38s
build-addon (linux/amd64, addon-linux-amd64) / build	53s
build (linux/arm64, base-linux-arm64) / build	1m 10s
build (linux/amd64, base-linux-amd64) / build	33s
build (linux/arm/v7, base-linux-arm-v7) / build	31s
merge-addon / merge	16s
merge / merge	9s
	7m 39s

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