Create a follow-up thread under the published message.
| Name | Type | Description | Notes |
|---|---|---|---|
| Name | string | Thread name (1-100 chars) | [optional] |
| AutoArchiveDuration | int | Auto-archive after inactivity (minutes) | [optional] |
| RateLimitPerUser | int | Slow-mode duration in seconds (0-21600) | [optional] |