Added tests/gateway/test_stream_consumer_draft.py with 11 tests
covering:
- Transport selection: auto+dm-supported -> draft; auto+group -> edit;
explicit edit; explicit draft on unsupported adapter -> edit;
MagicMock adapter -> edit (back-compat for the existing test suite).
- Happy path: DM stream animates draft frames with a single shared
draft_id, then finalizes via a regular adapter.send.
- Group fallback: drafts entirely skipped in non-DM chats.
- Failure fallback: send_draft returning success=False disables drafts
for the rest of the response.
- Draft_id lifecycle: consecutive responses use distinct ids; tool
boundaries bump the id so post-tool text animates fresh below the
tool-progress bubble (the openclaw #32535 leak guard).
- _already_sent contract: drafts must NOT set the flag so the gateway's
fallback final-send still fires (drafts have no message_id).
Updated website/docs/user-guide/messaging/telegram.md with a
'Streaming transport' section explaining auto|draft|edit|off, the
DM-only constraint, and the per-response fallback behaviour.
