Add idle session timeout to StreamableHTTPSessionManager #724

Job	Run time
checks / readme-snippets	9s
checks / pre-commit	35s
checks / test (3.11, lowest-direct, windows-latest)	2m 45s
checks / test (3.10, lowest-direct, ubuntu-latest)	57s
checks / test (3.12, lowest-direct, windows-latest)	3m 35s
checks / test (3.12, locked, ubuntu-latest)	58s
checks / test (3.13, locked, ubuntu-latest)	48s
checks / test (3.10, locked, windows-latest)	2m 53s
checks / test (3.12, lowest-direct, ubuntu-latest)	56s
checks / test (3.13, lowest-direct, ubuntu-latest)	50s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 14s
checks / test (3.13, lowest-direct, windows-latest)	2m 38s
checks / test (3.11, locked, ubuntu-latest)	48s
checks / test (3.11, locked, windows-latest)	2m 35s
checks / test (3.10, locked, ubuntu-latest)	54s
checks / test (3.11, lowest-direct, ubuntu-latest)	57s
checks / test (3.14, lowest-direct, windows-latest)	2m 7s
checks / test (3.14, locked, ubuntu-latest)	2m 19s
checks / test (3.13, locked, windows-latest)	2m 36s
checks / test (3.14, locked, windows-latest)	3m 7s
checks / test (3.10, lowest-direct, windows-latest)	2m 29s
checks / test (3.12, locked, windows-latest)	3m 17s
all-green	4s
	39m 31s

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