Support getting encryption context on a message #1001

Job	Run time
Formatting Check	1m 32s
Run unit tests	22m 7s
Lint	26m 58s
Build the Wireshark dissector (ubuntu-latest)	46s
Build CPP Client on Windows x86	20m 6s
Build CPP Client on Windows x64	20m 6s
Build RPM x86_64	12m 34s
Build Alpine x86_64	15m 19s
Build Deb x86_64	9m 33s
Build CPP Client on macOS with static dependencies	8m 27s
Build with the C++20 standard	5m 20s
Check Completion	1s
	2h 22m 49s

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