Document that channels.telegram.streaming.preview.toolProgress requires
channels.telegram.replyToMode: 'off'. Quote-reply requires the final message
reference at send time, which is incompatible with preview-edit streaming, so
the two features are mutually exclusive on Telegram.
Adds:
- Note callout in docs/channels/telegram.md after the existing toolProgress
guidance, explaining the exclusion and how to restore visibility.
- Cross-link bullet in docs/concepts/streaming.md pointing to the Telegram
channel doc for the full note.
Surfaces a doc/runtime gap that has been silent since v2026.4.22.