Force Docker rebuild on HF Spaces, add version stamp to startup log

ARG PIP_CACHE_BUST invalidates pip layer cache. Entrypoint now prints
StockEx version at startup so deploys can be verified from container logs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Dockerfile

@@ -28,6 +28,9 @@ RUN wget -q \
     && mv /opt/kafka_2.13-${KAFKA_VERSION} /opt/kafka \
     && rm /tmp/kafka.tgz
 
+# Cache-bust: increment to force pip reinstall on HF Spaces
+ARG PIP_CACHE_BUST=2
+
 # Install Python dependencies (quickfix compiles from source – allow extra time)
 RUN pip install --no-cache-dir \
       kafka-python==2.0.2 \

entrypoint.sh

@@ -1,6 +1,9 @@
 #!/bin/bash
 set -e
 
+STOCKEX_VERSION="2.0.1"
+echo "===== StockEx v${STOCKEX_VERSION} — Application Startup at $(date '+%Y-%m-%d %H:%M:%S') ====="
+
 KAFKA_DIR=/opt/kafka
 
 export PYTHONPATH=/app