Implement span started and live health metrics#7430

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JonasKunz wants to merge 12 commits intoopen-telemetry:mainfrom

JonasKunz:span-start-end-metrics

Commits on Jul 3, 2025

Replace span.ended with span.started, add parent.origin attrib
JonasKunz
committed
Merge remote-tracking branch 'otel/HEAD' into span-start-end-metrics
JonasKunz
committed

Commits on Jul 17, 2025

Merge remote-tracking branch 'otel/main' into span-start-end-metrics
JonasKunz
committed