ci: bump astral-sh/setup-uv from 4 to 7 #18

Job	Run time
Lint	9s
Performance Regression Gate	18s
Type check	18s
Memory Budget Check	12s
Test (Python 3.13 free-threaded, experimental)	11s
Test (Python 3.13)	28s
Test (Python 3.12)	20s
	1m 56s

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