fix: close all memory stream ends in client transport cleanup #1433

Job	Run time
checks / pre-commit	38s
checks / readme-snippets	11s
checks / test (3.13, lowest-direct, ubuntu-latest)	50s
checks / test (3.10, locked, windows-latest)	2m 29s
checks / test (3.12, lowest-direct, windows-latest)	3m 32s
checks / test (3.11, locked, ubuntu-latest)	51s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 5s
checks / test (3.12, locked, windows-latest)	3m 32s
checks / test (3.10, lowest-direct, ubuntu-latest)	59s
checks / test (3.10, locked, ubuntu-latest)	49s
checks / test (3.12, locked, ubuntu-latest)	1m 1s
checks / test (3.11, lowest-direct, windows-latest)	2m 42s
checks / test (3.11, locked, windows-latest)	2m 48s
checks / test (3.11, lowest-direct, ubuntu-latest)	49s
checks / test (3.13, locked, ubuntu-latest)	47s
checks / test (3.14, locked, ubuntu-latest)	2m 18s
checks / test (3.10, lowest-direct, windows-latest)	2m 43s
checks / test (3.13, lowest-direct, windows-latest)	2m 48s
checks / test (3.14, lowest-direct, windows-latest)	2m 45s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 10s
checks / test (3.13, locked, windows-latest)	2m 13s
checks / test (3.14, locked, windows-latest)	3m 43s
all-green	4s
	40m 47s

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