- Create() function now defaults Actor from BD_ACTOR env var when not provided
- CreateAgentBead() now passes --actor flag from BD_ACTOR for provenance tracking
- This ensures created_by is populated on all issue creation paths
Affects: merge requests, escalations, digests, agent beads, molecule steps
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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