Fix trucking campaign cron send date

docker-compose.yml

@@ -131,6 +131,9 @@ services:
       - CAMPAIGN_HAZMAT_ID=${CAMPAIGN_HAZMAT_ID}
     volumes:
       - worker-data:/app/data
+      # Read-only host MTA warmup stamp so the trucking campaign builder caps
+      # daily queued recipients in lockstep with Postfix/Listmonk warmup.
+      - /etc/postfix/pw-warmup-start:/etc/postfix/pw-warmup-start:ro
     depends_on:
       - api-postgres
     restart: unless-stopped