CD daemon: send SIGUSR1 to IMEX daemon on node updates #582

Job	Run time
basic / variables / variables	8s
basic / golang / check	1m 4s
basic / golang / Unit test	27s
basic / code-scanning / Analyze Go code with CodeQL	2m 41s
basic / golang / Build	29s
chart	0s
image	0s
	4m 49s

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