0641848c4b
Replace the 5-stage pipeline (CI→UAT→QA→CTO→CEO) with a three-branch promotion chain: dev (engineer self-merge) → uat (QA gates) → main (UAT gates). Removes CTO review stage, CEO merge bottleneck, and SLA timelines. Each gate owner has merge authority. Co-Authored-By: Paperclip <noreply@paperclip.ing>