fix: Make Context thread-safe #1261

Job	Run time
apple (macos-14, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	13m 10s
linux (jammy, 5.9)	11m 6s
apple (macos-14, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (a...	11m 14s
linux (jammy, 6.0)	11m 40s
apple (macos-14, Xcode_15.2, platform=visionOS Simulator,OS=1.0,name=Apple Vision Pro)	9m 7s
apple (macos-14, Xcode_15.2, platform=macOS)	10m 37s
linux (amazonlinux2, 5.9)	11m 31s
apple (macos-15, Xcode_16.1, platform=iOS Simulator,OS=18.1,name=iPhone 16)	9m 15s
linux (amazonlinux2, 6.0)	12m 4s
apple (macos-15, Xcode_16.1, platform=tvOS Simulator,OS=18.1,name=Apple TV 4K (3rd generation) (a...	10m 8s
apple (macos-15, Xcode_16.1, platform=visionOS Simulator,OS=2.1,name=Apple Vision Pro)	9m 37s
apple (macos-15, Xcode_16.1, platform=macOS)	10m 47s
	2h 10m 16s

Provide feedback