Test

✨ Set FASTAPI_ENV when running fastapi dev #1438

Job	Run time
test (3.12, macos-latest, lowest-direct)	42s
test (ubuntu-latest, 3.14, highest)	23s
test (3.13, windows-latest, highest)	43s
test (3.11, windows-latest, highest)	36s
test (3.10, ubuntu-latest, lowest-direct)	15s
test (3.13, ubuntu-latest, highest)	17s
test (windows-latest, 3.14, highest)	49s
test (macos-latest, 3.14, highest)	22s
coverage-combine	11s
check	3s
	4m 21s

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