MINIFICPP-2494 windows event log: fix event message formatting, refactor #5735

Job	Run time
macos-xcode	33m 41s
macos-xcode	33m 41s
Docker build for integration tests	1h 40m 56s
Docker build for integration tests	1h 40m 56s
rocky	1h 38m 15s
rocky	1h 38m 15s
ubuntu-22.04-clang	2h 8m 45s
ubuntu-22.04-clang	2h 8m 45s
ubuntu-24.04	41m 58s
ubuntu-24.04	41m 58s
windows-2022	20m 35s
windows-2022	1h 28m 10s
Docker integration tests	21m 32s
Docker integration tests	21m 32s
	15h 58m 59s

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