fix: add DATABASE_URL to docker-compose environment

The shared/db/pool.ts requires DATABASE_URL but it was missing from
both docker-compose.yml and Infisical, causing the container to
crash-loop on startup.

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

docker-compose.yml

@@ -37,6 +37,7 @@ services:
       - IMAP_PORT=993
       - IMAP_TLS_REJECT_UNAUTHORIZED=false
       - TWENTY_API_URL=https://rnetwork.online
+      - DATABASE_URL=postgresql://rspace:${POSTGRES_PASSWORD}@rspace-db:5432/rspace
     depends_on:
       rspace-db:
         condition: service_healthy