fix(docker): maturin not found in ragfs-python build step — missing venv PATH in py-builder stage

[gaomind]

Bug Description

After merging #1221 (agfs → ragfs rewrite), the Dockerfile's py-builder stage fails with maturin: not found when building on cloud CI environments.

Steps to Reproduce

Build the Dockerfile from the main branch on a clean CI environment (e.g., GitHub Actions, GitLab CI):

docker build -t openviking .

Error

#34 117.5  + maturin==1.12.6
#34 117.5 /bin/sh: 1: maturin: not found
#34 ERROR: executor failed running [...]: exit code: 127

Root Cause

In the py-builder stage (line 75-99), uv pip install maturin installs maturin to /app/.venv/bin/maturin. However, the PATH at this stage only includes /usr/local/cargo/bin:/usr/local/go/bin (set at line 19), not /app/.venv/bin.

The runtime stage (Stage 4, line 111) has ENV PATH="/app/.venv/bin:$PATH", but this doesn't apply to the py-builder stage where maturin is actually invoked.

Suggested Fix

Add the venv to PATH before the ragfs-python build step:

ENV PATH="/app/.venv/bin:${PATH}"
RUN --mount=type=cache,target=/root/.cache/uv,id=uv-${TARGETPLATFORM} \
    uv pip install maturin && \
    ...

Environment

• OpenViking: main branch (post v0.3.3, includes reorg: Rewrite agfs to ragfs with rust #1221)
• Docker: BuildKit
• Platform: linux/amd64 (cloud CI)

[zhoujh01]

Thank you for your feedback. We will fix this issue.

[zhoujh01]

#1295