Strict type checking fixes #1433

Job	Run time
Make RTC sdist	18s
Build RTC wheels (x86_64 arm64)	1m 7s
Build RTC wheels (AMD64)	2m 33s
Build RTC wheels (x86_64)	53s
Build RTC wheels (aarch64)	1m 24s
Generating protobuf	25s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	48s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	42s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	40s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	1m 13s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	55s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	1m 0s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	46s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	32s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	1m 35s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	28s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	1m 6s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	28s
Publish RTC release	-1s
docs	-1s
	16m 51s

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