OpenTelemetry MCP client spans #1149

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	34s
checks / test (3.10, lowest-direct, ubuntu-latest)	50s
checks / test (3.10, locked, ubuntu-latest)	48s
checks / test (3.11, lowest-direct, windows-latest)	3m 12s
checks / test (3.10, locked, windows-latest)	2m 15s
checks / test (3.12, lowest-direct, windows-latest)	4m 17s
checks / test (3.11, locked, ubuntu-latest)	49s
checks / test (3.10, lowest-direct, windows-latest)	2m 46s
checks / test (3.11, locked, windows-latest)	2m 33s
checks / test (3.11, lowest-direct, ubuntu-latest)	50s
checks / test (3.12, locked, ubuntu-latest)	56s
checks / test (3.12, locked, windows-latest)	3m 17s
checks / test (3.12, lowest-direct, ubuntu-latest)	57s
checks / test (3.13, locked, ubuntu-latest)	47s
checks / test (3.13, lowest-direct, windows-latest)	2m 49s
checks / test (3.13, lowest-direct, ubuntu-latest)	49s
checks / test (3.14, lowest-direct, windows-latest)	2m 19s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 14s
checks / test (3.13, locked, windows-latest)	2m 17s
checks / test (3.14, locked, windows-latest)	3m 10s
checks / test (3.14, locked, ubuntu-latest)	2m 28s
all-green	2s
	40m 10s

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