feat: add idle timeout for StreamableHTTP sessions #4132

Job	Run time
checks / pre-commit	34s
checks / readme-snippets	10s
checks / test (3.11, lowest-direct, ubuntu-latest)	48s
checks / test (3.13, lowest-direct, windows-latest)	3m 3s
checks / test (3.10, highest, windows-latest)	2m 29s
checks / test (3.10, lowest-direct, ubuntu-latest)	42s
checks / test (3.12, lowest-direct, windows-latest)	3m 26s
checks / test (3.10, lowest-direct, windows-latest)	2m 30s
checks / test (3.12, highest, ubuntu-latest)	52s
checks / test (3.10, highest, ubuntu-latest)	49s
checks / test (3.13, lowest-direct, ubuntu-latest)	45s
checks / test (3.12, highest, windows-latest)	3m 29s
checks / test (3.11, highest, ubuntu-latest)	45s
checks / test (3.13, highest, ubuntu-latest)	44s
checks / test (3.12, lowest-direct, ubuntu-latest)	52s
checks / test (3.11, highest, windows-latest)	2m 56s
checks / test (3.13, highest, windows-latest)	2m 34s
checks / test (3.11, lowest-direct, windows-latest)	2m 26s
all-green	3s
	29m 57s

Provide feedback