Add idle session timeout to StreamableHTTPSessionManager #718

Job	Run time
checks / pre-commit	40s
checks / readme-snippets	12s
checks / test (3.10, locked, ubuntu-latest)	48s
checks / test (3.11, locked, windows-latest)	2m 30s
checks / test (3.11, locked, ubuntu-latest)	45s
checks / test (3.10, lowest-direct, windows-latest)	2m 16s
checks / test (3.11, lowest-direct, windows-latest)	2m 42s
checks / test (3.10, locked, windows-latest)	2m 29s
checks / test (3.11, lowest-direct, ubuntu-latest)	49s
checks / test (3.12, lowest-direct, ubuntu-latest)	52s
checks / test (3.12, lowest-direct, windows-latest)	3m 48s
checks / test (3.14, lowest-direct, windows-latest)	2m 20s
checks / test (3.10, lowest-direct, ubuntu-latest)	44s
checks / test (3.12, locked, windows-latest)	3m 25s
checks / test (3.13, locked, windows-latest)	2m 9s
checks / test (3.13, locked, ubuntu-latest)	43s
checks / test (3.12, locked, ubuntu-latest)	52s
checks / test (3.14, locked, windows-latest)	3m 13s
checks / test (3.14, locked, ubuntu-latest)	2m 14s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 12s
checks / test (3.13, lowest-direct, ubuntu-latest)	46s
checks / test (3.13, lowest-direct, windows-latest)	2m 39s
all-green	5s
	38m 13s

Provide feedback