data pipeline refactor and fix

sandbox/Dockerfile

@@ -11,7 +11,6 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
 # Copy dependency specifications
-COPY setup.py .
 COPY environment.yml .
 COPY dexorder/ dexorder/
 
@@ -27,9 +26,6 @@ RUN mkdir -p dexorder/generated && \
 RUN conda env create -f environment.yml -p /build/env && \
     conda clean -afy
 
-# Install the local package into the conda environment
-RUN /build/env/bin/pip install --no-cache-dir .
-
 # =============================================================================
 # Runtime stage
 # =============================================================================
@@ -75,7 +71,8 @@ RUN chmod 755 /app/entrypoint.sh && chown root:root /app/entrypoint.sh
 USER dexorder
 
 # Environment variables (can be overridden in k8s)
-ENV PYTHONUNBUFFERED=1 \
+ENV PYTHONPATH=/app \
+    PYTHONUNBUFFERED=1 \
     MPLCONFIGDIR=/tmp \
     NUMBA_CACHE_DIR=/tmp/numba_cache \
     LOG_LEVEL=INFO \