* fix: remove src/backend/base/uv.lock and Dockerfile references
- Deleted src/backend/base/uv.lock (monorepo should have only one uv.lock at root)
- Removed COPY ./src/backend/base/uv.lock lines from all Dockerfiles:
- docker/build_and_push.Dockerfile
- docker/build_and_push_base.Dockerfile
- docker/build_and_push_ep.Dockerfile
- docker/build_and_push_with_extras.Dockerfile
- docker/dev.Dockerfile
Fixes LE-1093
* fix: remove stale base uv.lock regeneration paths