Pass ANTHROPIC_API_KEY through to Docker container

The env var was in .env but not listed in docker-compose environment
block, so the container never received it.

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

docker-compose.yml

@@ -64,6 +64,8 @@ services:
       AUTH_MICROSOFT_ENTRA_ID_TENANT_ID: ${AUTH_MICROSOFT_ENTRA_ID_TENANT_ID}
       CRON_SECRET: ${CRON_SECRET:-change-me}
       API_KEY: ${API_KEY:-}
+      ANTHROPIC_API_KEY: ${ANTHROPIC_API_KEY:-}
+      ANTHROPIC_MODEL: ${ANTHROPIC_MODEL:-}
       DEV_BYPASS_AUTH: ${DEV_BYPASS_AUTH:-false}
       DEV_USER_ID: ${DEV_USER_ID:-}
     volumes: