Add manifest.json as the runtime source of truth (#15) #71

Job	Run time
Read build matrix from manifest	4s
Build Python 3.13.14 / Build Python for Windows	1m 21s
Build Python 3.13.14 / Build Python for iOS and macOS	1m 32s
Build Python 3.12.13 / Build Python for iOS and macOS	1m 33s
Build Python 3.13.14 / Build Python for Android	1m 33s
Build Python 3.12.13 / Build Python for Linux	21s
Build Python 3.12.13 / Build Python for Android	1m 32s
Build Python 3.14.6 / Build Python for Windows	1m 12s
Build Python 3.12.13 / Build Python for Windows	1m 18s
Build Python 3.14.6 / Build Python for Linux	23s
Build Python 3.14.6 / Build Python for Android	1m 33s
Build Python 3.14.6 / Build Python for iOS and macOS	1m 2s
Build Python 3.13.14 / Build Python for Linux	26s
Publish Release Assets	1s
	13m 51s

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