Dockerfile: include Data/ directory for IMS weather cache

Dockerfile

@@ -10,10 +10,11 @@ RUN pip install --no-cache-dir -r requirements.txt -r backend/requirements.txt
 # Non-root user for security
 RUN groupadd -r solarwine && useradd -r -g solarwine solarwine
 
-# Copy application code (no Data/ — mount or fetch at runtime)
+# Copy application code and data cache
 COPY src/ src/
 COPY config/ config/
 COPY backend/ backend/
+COPY Data/ Data/
 
 ENV PYTHONPATH=/app