fix: invalidate tool schema cache on ToolListChangedNotification; paginate all pages in _validate_tool_result #1857

Job	Run time
checks / readme-snippets	9s
checks / pre-commit	20s
checks / test (3.10, lowest-direct, ubuntu-latest)	59s
checks / test (3.12, lowest-direct, windows-latest)	4m 18s
checks / test (3.10, lowest-direct, windows-latest)	2m 37s
checks / test (3.11, lowest-direct, ubuntu-latest)	55s
checks / test (3.12, lowest-direct, ubuntu-latest)	59s
checks / test (3.12, locked, windows-latest)	3m 30s
checks / test (3.11, lowest-direct, windows-latest)	2m 46s
checks / test (3.12, locked, ubuntu-latest)	55s
checks / test (3.10, locked, windows-latest)	2m 32s
checks / test (3.11, locked, windows-latest)	2m 42s
checks / test (3.10, locked, ubuntu-latest)	53s
checks / test (3.11, locked, ubuntu-latest)	46s
checks / test (3.13, lowest-direct, ubuntu-latest)	53s
checks / test (3.14, lowest-direct, windows-latest)	2m 25s
checks / test (3.13, locked, windows-latest)	2m 53s
checks / test (3.13, locked, ubuntu-latest)	50s
checks / test (3.14, locked, ubuntu-latest)	2m 31s
checks / test (3.13, lowest-direct, windows-latest)	2m 31s
checks / test (3.14, locked, windows-latest)	3m 34s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 21s
all-green	4s
	41m 23s

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