wip: support tool retry on timeout via idempotencyKey param in CallToolRequestParams #1593

Job	Run time
checks / pre-commit	20s
checks / readme-snippets	11s
checks / test (3.12, lowest-direct, ubuntu-latest)	39s
checks / test (3.10, locked, ubuntu-latest)	34s
checks / test (3.12, locked, windows-latest)	1m 5s
checks / test (3.11, lowest-direct, windows-latest)	1m 12s
checks / test (3.10, lowest-direct, ubuntu-latest)	39s
checks / test (3.11, lowest-direct, ubuntu-latest)	34s
checks / test (3.10, lowest-direct, windows-latest)	1m 7s
checks / test (3.10, locked, windows-latest)	1m 34s
checks / test (3.14, lowest-direct, windows-latest)	57s
checks / test (3.13, locked, windows-latest)	1m 11s
checks / test (3.14, locked, ubuntu-latest)	1m 34s
checks / test (3.14, locked, windows-latest)	2m 19s
checks / test (3.12, lowest-direct, windows-latest)	1m 8s
checks / test (3.11, locked, windows-latest)	1m 6s
checks / test (3.13, lowest-direct, windows-latest)	1m 12s
checks / test (3.14, lowest-direct, ubuntu-latest)	26s
checks / test (3.12, locked, ubuntu-latest)	40s
checks / test (3.13, lowest-direct, ubuntu-latest)	36s
checks / test (3.11, locked, ubuntu-latest)	35s
checks / test (3.13, locked, ubuntu-latest)	31s
all-green	3s
	20m 13s

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