Add workflow-rooted ExecutionOtelPlugin and fix OtelPlugin status parity - #570

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SilanHe wants to merge 6 commits into

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feat/otel-execution-plugin

Commits on Jul 28, 2026

Map RETRYING invocation-span status to UNSET, document rationale
hsilan
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Fix inaccurate comment in ExecutionOtelPlugin continuation branch
hsilan
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