Pin every dependency across all Docker builds so upgrades are intentional.
Verified by building all 3 production images and diffing pip freeze against
known-good v1.83.0-nightly baselines — zero version drift.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The `apk` commands can utilize the `--no-cache` option, making the
`update` step superfluous and ensuring the latest packages are used
without maintaining a local cache. An additional `apk update` in the
Dockerfile will just make the image larger with no benefits.
Remove unnecessary `apk update` and manual cache cleanup steps in the
Alpine Dockerfile. By using `apk add --no-cache`, we avoid manual cache
management, making the Dockerfile simpler and easier to maintain.
