gmail +watch PREREQUISITE: Read for auth, global flags, and security rules. If missing, run to create it. Watch for new emails and stream them as NDJSON Usage Flags | Flag | Required | Default | Description | |------|----------|---------|-------------| | | — | — | GCP project ID for Pub/Sub resources | | | — | — | Existing Pub/Sub subscription name (skip setup) | | | — | — | Existing Pub/Sub topic with Gmail push permission already granted | | | — | — | Comma-separated Gmail label IDs to filter (e.g., INBOX,UNREAD) | | | — | 10 | Max messages per pull batch | | | — | 5 | Seconds between pulls…