fix: suppress MCPServer KeyboardInterrupt tracebacks #2567

Job	Run time
checks / readme-snippets	14s
checks / pre-commit	37s
checks / test (3.10, lowest-direct, ubuntu-latest)	55s
checks / test (3.11, lowest-direct, ubuntu-latest)	54s
checks / test (3.10, locked, ubuntu-latest)	50s
checks / test (3.10, lowest-direct, windows-latest)	1m 44s
checks / test (3.11, lowest-direct, windows-latest)	2m 25s
checks / test (3.11, locked, windows-latest)	1m 14s
checks / test (3.10, locked, windows-latest)	1m 51s
checks / test (3.13, lowest-direct, windows-latest)	1m 35s
checks / test (3.14, locked, ubuntu-latest)	1m 53s
checks / test (3.12, lowest-direct, windows-latest)	1m 18s
checks / test (3.13, lowest-direct, ubuntu-latest)	47s
checks / test (3.13, locked, ubuntu-latest)	42s
checks / test (3.12, locked, windows-latest)	1m 21s
checks / test (3.12, locked, ubuntu-latest)	54s
checks / test (3.12, lowest-direct, ubuntu-latest)	55s
checks / test (3.14, lowest-direct, windows-latest)	1m 22s
checks / test (3.11, locked, ubuntu-latest)	45s
checks / test (3.13, locked, windows-latest)	1m 29s
checks / test (3.14, locked, windows-latest)	1m 57s
checks / test (3.14, lowest-direct, ubuntu-latest)	48s
all-green	3s
	26m 33s

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