Only keys .env.example lists, so optional ones such as APP_PORT stay quiet. A missing TZ used to run every cron on UTC without a word. Never fails. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WgBfkm4rCmtd1T4vHWjEPx