feat(coding-agent): let root agents create sibling sessions (RES-1256) - #1996

Bugbot Analysis Progress (2m 47s elapsed)

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✅ Completed bug detection (2m 42s)
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Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_86b6ede4-a7c5-438f-bef7-e9c27bb0b7f8