fix: preserve stdio streams in server transport #2463

Job	Run time
checks / pre-commit	35s
checks / readme-snippets	15s
checks / test (3.11, lowest-direct, ubuntu-latest)	59s
checks / test (3.11, lowest-direct, windows-latest)	2m 18s
checks / test (3.10, lowest-direct, windows-latest)	2m 20s
checks / test (3.10, locked, windows-latest)	2m 17s
checks / test (3.12, locked, windows-latest)	2m 44s
checks / test (3.11, locked, ubuntu-latest)	50s
checks / test (3.12, locked, ubuntu-latest)	1m 2s
checks / test (3.14, lowest-direct, windows-latest)	2m 10s
checks / test (3.11, locked, windows-latest)	1m 36s
checks / test (3.10, lowest-direct, ubuntu-latest)	57s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 15s
checks / test (3.10, locked, ubuntu-latest)	1m 0s
checks / test (3.14, locked, windows-latest)	2m 31s
checks / test (3.14, locked, ubuntu-latest)	2m 19s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.13, lowest-direct, windows-latest)	2m 21s
checks / test (3.12, lowest-direct, windows-latest)	3m 5s
checks / test (3.13, lowest-direct, ubuntu-latest)	58s
checks / test (3.13, locked, windows-latest)	2m 3s
checks / test (3.13, locked, ubuntu-latest)	52s
all-green	3s
	35m 32s

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