feat: add idle timeout for StreamableHTTP sessions #4160

Job	Run time
checks / test (3.10, highest, ubuntu-latest)	47s
checks / pre-commit	30s
checks / test (3.11, highest, ubuntu-latest)	46s
checks / test (3.10, lowest-direct, ubuntu-latest)	49s
checks / test (3.10, highest, windows-latest)	3m 1s
checks / test (3.12, lowest-direct, ubuntu-latest)	55s
checks / test (3.13, lowest-direct, ubuntu-latest)	45s
checks / test (3.11, lowest-direct, windows-latest)	2m 32s
checks / test (3.11, highest, windows-latest)	3m 23s
checks / test (3.13, highest, ubuntu-latest)	46s
checks / test (3.10, lowest-direct, windows-latest)	2m 29s
checks / test (3.12, highest, ubuntu-latest)	55s
checks / test (3.11, lowest-direct, ubuntu-latest)	48s
checks / readme-snippets	11s
checks / test (3.12, highest, windows-latest)	3m 12s
checks / test (3.13, highest, windows-latest)	2m 36s
checks / test (3.13, lowest-direct, windows-latest)	2m 26s
checks / test (3.12, lowest-direct, windows-latest)	3m 46s
all-green	5s
	30m 42s

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