Support getting encryption context on a message #1007

Job	Run time
Formatting Check	1m 38s
Lint	28m 26s
Build the Wireshark dissector (ubuntu-latest)	58s
Run unit tests	22m 0s
Build CPP Client on Windows x86	13m 40s
Build CPP Client on Windows x64	16m 53s
Build with the C++20 standard	5m 21s
Build RPM x86_64	10m 11s
Build Alpine x86_64	15m 59s
Build Deb x86_64	10m 42s
Build CPP Client on macOS with static dependencies	8m 30s
Check Completion	3s
	2h 14m 21s

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