add optional reason to Room.disconnect() #1278

Job	Run time
Generating protobuf	14s
Build RTC wheels (aarch64)	1m 13s
Build RTC wheels (x86_64 arm64)	50s
Make RTC sdist	14s
Build RTC wheels (x86_64)	46s
Build RTC wheels (AMD64)	1m 22s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	1m 8s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	26s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	29s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	1m 37s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	55s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	32s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	24s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	27s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	47s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	45s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	1m 15s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	27s
Publish RTC release	0s
docs	0s
	13m 51s

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