Report cache_peer context in probe and standby pool messages #223

Job	Run time
CodeQL-tests	33m 23s
source-maintenance-tests	3m 2s
functionality-tests	18m 22s
build-tests(ubuntu-22.04,gcc,default)	11m 7s
build-tests(ubuntu-22.04,gcc,minimal)	6m 8s
build-tests(ubuntu-22.04,gcc,maximus)	13m 6s
build-tests(ubuntu-22.04,clang,default)	12m 58s
build-tests(ubuntu-22.04,clang,minimal)	7m 29s
build-tests(ubuntu-22.04,clang,maximus)	15m 24s
	2h 0m 59s

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