Tests

Json struct c docs #7678

Job	Run time
Windows (mingw64, x86_64)	2m 16s
Bespoke C tests	49s
Bespoke Python tests	1m 14s
Windows (mingw32, i686)	2m 12s
C tests / C unit tests	59s
Python packaging / Python packaging tests	38s
Python-C tests / Python-C unit tests	42s
Python (3.11, macos-latest) / Unit tests	9m 41s
Python (3.13, macos-latest) / Unit tests	8m 56s
Python (3.11, windows-latest) / Unit tests	21m 55s
Python (3.13, ubuntu-24.04) / Unit tests	16m 18s
Python (3.11, ubuntu-24.04) / Unit tests	14m 2s
Python (3.13, windows-latest) / Unit tests	20m 10s
	1h 39m 52s

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