Handle consumer exit status in compose.yaml

Updated the `messenger:consume` command in `compose.yaml` to run as the `PHP_FPM_USER` and added error handling to stop the container if the consumer exits with a non-zero status.

templates/compose.yaml

@@ -53,7 +53,12 @@ services:
               sleep 3 && bin/console cache:clear &&
               while ! [ -f /tmp/kill_me ];
               do
-              php -d memory_limit=2G bin/console messenger:consume priority async --limit=20 --time-limit=600 -v;
+              su -s /bin/bash -c 'php -d memory_limit=2G bin/console messenger:consume priority async --limit=20 --time-limit=600 -v' "$PHP_FPM_USER";
+              rc=$?;
+              if [ $rc -ne 0 ]; then
+                echo "Consumer exited with status $rc. Stopping container.";
+                exit $rc;
+              fi
               done;
         pre_stop:
             - command: