fix: invalidate tool schema cache on ToolListChangedNotification; paginate all pages in _validate_tool_result #1858

Job	Run time
checks / pre-commit	43s
checks / readme-snippets	11s
checks / test (3.11, lowest-direct, ubuntu-latest)	56s
checks / test (3.10, lowest-direct, windows-latest)	2m 33s
checks / test (3.11, locked, windows-latest)	4m 1s
checks / test (3.10, locked, windows-latest)	2m 43s
checks / test (3.11, lowest-direct, windows-latest)	2m 59s
checks / test (3.11, locked, ubuntu-latest)	53s
checks / test (3.10, locked, ubuntu-latest)	54s
checks / test (3.12, locked, ubuntu-latest)	59s
checks / test (3.10, lowest-direct, ubuntu-latest)	52s
checks / test (3.12, locked, windows-latest)	3m 15s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 0s
checks / test (3.13, locked, ubuntu-latest)	48s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 24s
checks / test (3.12, lowest-direct, windows-latest)	3m 47s
checks / test (3.13, lowest-direct, windows-latest)	2m 39s
checks / test (3.14, lowest-direct, windows-latest)	2m 23s
checks / test (3.13, lowest-direct, ubuntu-latest)	59s
checks / test (3.13, locked, windows-latest)	2m 40s
checks / test (3.14, locked, ubuntu-latest)	2m 29s
checks / test (3.14, locked, windows-latest)	3m 5s
all-green	2s
	42m 15s

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