Add role-based filtering and imporve code

services/demo_session/Dockerfile

@@ -1,42 +1,48 @@
-# Multi-stage build for Demo Session Service
-FROM python:3.11-slim as builder
+# Demo Session Dockerfile
+# Add this stage at the top of each service Dockerfile
+FROM python:3.11-slim AS shared
+WORKDIR /shared
+COPY shared/ /shared/
 
-WORKDIR /app
-
-# Install build dependencies
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    gcc \
-    g++ \
-    && rm -rf /var/lib/apt/lists/*
-
-# Copy requirements and install
-COPY services/demo_session/requirements.txt .
-RUN pip install --no-cache-dir --user -r requirements.txt
-
-# Final stage
+# Then your main service stage
 FROM python:3.11-slim
 
 WORKDIR /app
 
-# Copy Python dependencies from builder
-COPY --from=builder /root/.local /root/.local
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    gcc \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
 
-# Copy shared libraries
-COPY shared/ /app/shared/
+# Copy requirements
+COPY shared/requirements-tracing.txt /tmp/
 
-# Copy service code
-COPY services/demo_session/ /app/
+COPY services/demo_session/requirements.txt .
 
-# Copy scripts
+# Install Python dependencies
+RUN pip install --no-cache-dir -r /tmp/requirements-tracing.txt
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy shared libraries from the shared stage
+COPY --from=shared /shared /app/shared
+
+# Copy application code
+COPY services/demo_session/ .
+
+# Copy scripts for migrations
 COPY scripts/ /app/scripts/
 
-# Make sure scripts are in path
-ENV PATH=/root/.local/bin:$PATH
-ENV PYTHONPATH=/app:$PYTHONPATH
+# Add shared libraries to Python path
+ENV PYTHONPATH="/app:/app/shared:${PYTHONPATH:-}"
+
+# Expose port
+EXPOSE 8000
 
 # Health check
 HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
-    CMD python -c "import httpx; httpx.get('http://localhost:8000/health')"
+    CMD curl -f http://localhost:8000/health || exit 1
 
 # Run the application
 CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]