Add idle session timeout to StreamableHTTPSessionManager #725

Job	Run time
checks / readme-snippets	12s
checks / pre-commit	39s
checks / test (3.12, lowest-direct, ubuntu-latest)	59s
checks / test (3.10, lowest-direct, windows-latest)	2m 19s
checks / test (3.10, locked, windows-latest)	2m 7s
checks / test (3.12, locked, ubuntu-latest)	59s
checks / test (3.12, lowest-direct, windows-latest)	3m 52s
checks / test (3.12, locked, windows-latest)	3m 20s
checks / test (3.13, lowest-direct, windows-latest)	2m 33s
checks / test (3.13, locked, windows-latest)	2m 31s
checks / test (3.14, locked, windows-latest)	3m 7s
checks / test (3.11, locked, ubuntu-latest)	50s
checks / test (3.11, lowest-direct, ubuntu-latest)	55s
checks / test (3.11, lowest-direct, windows-latest)	2m 39s
checks / test (3.13, lowest-direct, ubuntu-latest)	51s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 16s
checks / test (3.11, locked, windows-latest)	2m 24s
checks / test (3.10, locked, ubuntu-latest)	50s
checks / test (3.14, lowest-direct, windows-latest)	2m 15s
checks / test (3.13, locked, ubuntu-latest)	46s
checks / test (3.14, locked, ubuntu-latest)	2m 13s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 8s
all-green	4s
	38m 49s

Provide feedback