subscription_thread_dispatcher: guard against duplicate room events #293

Job	Run time
Detect Changes	7s
License Check / License Check	5s
Link Check / Link Check	6s
Generate Docs / Generate and verify docs	23s
C++ Checks / clang-format	19s
Tests / Code Coverage	19m 31s
C++ Checks / clang-tidy	12m 7s
Tests / Test (linux-arm64)	9m 30s
Tests / Test (windows-x64)	16m 56s
Tests / Test (macos-arm64)	8m 12s
Builds / Build (macos-arm64)	4m 21s
Tests / Test (macos-x64)	15m 24s
Builds / Build (linux-x64)	9m 9s
Builds / Build (windows-x64)	9m 53s
Builds / Build (linux-arm64)	8m 4s
Builds / Build (macos-x64)	12m 41s
Tests / Test (linux-x64)	12m 29s
Docker Images	0s
Rust Release Check	0s
CI	3s
	2h 19m 20s

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