fix: add Python dependencies installation

- Add pip install before running Flask migrations
- Fix openai module not found error
- Improve error handling for database initialization
- Add proper working directory management

docker/entrypoint.sh

@@ -87,8 +87,12 @@ check_redis || {
     exit 1
 }
 
-# Initialize database if needed
+# Install Python dependencies
 cd /app/api
+echo "Installing Python dependencies..."
+pip install -r requirements.txt
+
+# Initialize database if needed
 if [ ! -f ".db_initialized" ]; then
     echo "Running database migrations..."
     flask db upgrade