feat: add idle timeout for StreamableHTTP sessions #4168

Job	Run time
checks / pre-commit	34s
checks / readme-snippets	15s
checks / test (3.12, highest, windows-latest)	3m 52s
checks / test (3.11, lowest-direct, ubuntu-latest)	47s
checks / test (3.10, lowest-direct, ubuntu-latest)	48s
checks / test (3.11, highest, ubuntu-latest)	45s
checks / test (3.12, lowest-direct, windows-latest)	3m 21s
checks / test (3.13, highest, ubuntu-latest)	46s
checks / test (3.10, lowest-direct, windows-latest)	2m 28s
checks / test (3.10, highest, windows-latest)	2m 25s
checks / test (3.11, highest, windows-latest)	2m 36s
checks / test (3.11, lowest-direct, windows-latest)	2m 40s
checks / test (3.10, highest, ubuntu-latest)	48s
checks / test (3.12, highest, ubuntu-latest)	56s
checks / test (3.13, lowest-direct, ubuntu-latest)	44s
checks / test (3.12, lowest-direct, ubuntu-latest)	50s
checks / test (3.13, lowest-direct, windows-latest)	2m 51s
checks / test (3.13, highest, windows-latest)	2m 37s
all-green	4s
	30m 7s

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