subscription_thread_dispatcher: guard against duplicate room events #255

Job	Run time
Detect Changes	7s
License Check / License Check	5s
Link Check / Link Check	10s
C++ Checks / clang-tidy	12m 8s
C++ Checks / clang-format	17s
Generate Docs / Generate and verify docs	28s
Builds / Build (macos-arm64)	4m 15s
Tests / Code Coverage	17m 22s
Builds / Build (linux-x64)	8m 27s
Builds / Build (macos-x64)	13m 53s
Builds / Build (linux-arm64)	8m 8s
Builds / Build (windows-x64)	9m 31s
Tests / Test (macos-arm64)	7m 46s
Tests / Test (linux-arm64)	9m 31s
Tests / Test (linux-x64)	10m 39s
Tests / Test (macos-x64)	15m 5s
Rust Release Check	-1s
Docker Images	-1s
Tests / Test (windows-x64)	13m 36s
CI	3s
	2h 11m 29s

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