Support getting encryption context on a message #1004

Job	Run time
Formatting Check	1m 31s
Build the Wireshark dissector (ubuntu-latest)	44s
Lint	27m 19s
Run unit tests	22m 37s
Build CPP Client on Windows x64	35m 36s
Build CPP Client on Windows x86	30m 29s
Build RPM x86_64	12m 29s
Build with the C++20 standard	5m 45s
Build Alpine x86_64	16m 2s
Build CPP Client on macOS with static dependencies	8m 49s
Build Deb x86_64	9m 14s
Check Completion	4s
	2h 50m 39s

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