chore: consistently use otelx.End(); fix some incorrect API docs #1887

Job	Run time
Run OIDC conformity tests	8m 38s
Generate SDKs	3m 31s
Run tests and lints	18m 28s
Run end-to-end tests (memory)	5m 3s
Run HSM tests	6m 16s
Run end-to-end tests (memory, --jwt)	5m 13s
Run end-to-end tests (postgres)	5m 21s
Run end-to-end tests (postgres, --jwt)	5m 9s
Run end-to-end tests (mysql)	5m 23s
Run end-to-end tests (mysql, --jwt)	5m 24s
Run end-to-end tests (cockroach)	5m 25s
Run end-to-end tests (cockroach, --jwt)	5m 42s
Build CLI docs	1m 1s
Generate changelog	0s
Generate release	0s
Release SDKs	0s
Render version schema	0s
Draft newsletter	0s
Pending approval Slack notification	0s
Send newsletter	0s
	1h 20m 34s

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