changed python package testing to simple health check

Dockerfile

@@ -30,7 +30,10 @@ COPY backend/src/ ./src/
 RUN npm run build
 
 # Verify Python and OR-Tools installation
-RUN python -c "from ortools.sat.python import cp_model; print('OR-Tools installed successfully')"
+RUN python - <<'EOF'
+import ortools
+import ortools.sat.python.cp_model
+EOF
 
 # Frontend build stage
 FROM node:20-alpine AS frontend-builder