fixed trigger creation

src/energy_consumption_ingester/database.py

@@ -116,7 +116,8 @@ class DatabaseStorage:
         END;
         $$ language 'plpgsql';
 
-        -- Create trigger for metering_points
+        -- Create trigger for metering_points (drop if exists first)
+        DROP TRIGGER IF EXISTS update_metering_points_updated_at ON metering_points;
         CREATE TRIGGER update_metering_points_updated_at
             BEFORE UPDATE ON metering_points
             FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();