ci(backend): optimize Docker image size — reduce bloat in builder COPY layer#11921

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Bentlybro wants to merge 3 commits intoSignificant-Gravitas:devfrom

Bentlybro:docker/optimize-backend-image-size

Commits on Jan 31, 2026

docker: optimize backend image size — reduce ~862MB COPY layer
Bentlybro
committed
fix: address review feedback — keep setuptools, remove redundant mkdir, add comments
Bentlybro
committed
refactor(backend): revert selective COPY, keep cleanup approach
Bentlybro
committed