fix: Pass admin bootstrap env vars to API container

ADMIN_EMAIL and ADMIN_PASSWORD were in the .env file but not
forwarded to the API container — bootstrap_admin() couldn't
read them, so no initial user was created. Login returned 400
on every attempt because no user existed in the database.

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

docker/docker-compose.yml

@@ -46,6 +46,10 @@ services:
       SMTP_PASSWORD: ${SMTP_PASSWORD}
       SMTP_FROM: ${SMTP_FROM:-noreply@corrosionmgmt.com}
       FRONTEND_URL: ${FRONTEND_URL:-https://panel.corrosionmgmt.com}
+      ADMIN_EMAIL: ${ADMIN_EMAIL}
+      ADMIN_PASSWORD: ${ADMIN_PASSWORD}
+      ADMIN_USERNAME: ${ADMIN_USERNAME:-Commander}
+      ADMIN_LICENSE_KEY: ${ADMIN_LICENSE_KEY:-}
       RUST_LOG: corrosion_api=info,tower_http=info
     volumes:
       - map_data:/data/maps