ref: Align span metadata type #202

Job	Run time
adk-py / test	19s
langchain-py (3.12, windows-latest) / test	58s
langchain-py (3.13, ubuntu-latest) / test	25s
langchain-py (3.11, ubuntu-latest) / test	34s
langchain-py (3.10, windows-latest) / test	55s
build (3.10, ubuntu-latest, 0)	5m 33s
langchain-py (3.13, windows-latest) / test	1m 32s
build (3.10, windows-latest, 1)	12m 20s
langchain-py (3.11, windows-latest) / test	1m 7s
build (3.10, windows-latest, 0)	10m 40s
langchain-py (3.10, ubuntu-latest) / test	27s
build (3.10, ubuntu-latest, 1)	6m 5s
build (3.12, ubuntu-latest, 0)	5m 5s
build (3.11, ubuntu-latest, 0)	5m 15s
build (3.13, windows-latest, 0)	9m 22s
build (3.11, ubuntu-latest, 1)	6m 23s
build (3.13, ubuntu-latest, 0)	5m 18s
build (3.13, ubuntu-latest, 1)	6m 20s
build (3.12, windows-latest, 1)	11m 48s
build (3.12, ubuntu-latest, 1)	6m 23s
build (3.13, windows-latest, 1)	11m 33s
build (3.14, windows-latest, 0)	10m 26s
build (3.11, windows-latest, 1)	12m 38s
build (3.11, windows-latest, 0)	9m 24s
build (3.14, windows-latest, 1)	12m 17s
langchain-py (3.12, ubuntu-latest) / test	28s
build (3.12, windows-latest, 0)	10m 36s
build (3.14, ubuntu-latest, 0)	5m 31s
build (3.14, ubuntu-latest, 1)	6m 33s
upload-wheel	16s
	2h 56m 31s

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