Replies in Telegram forum topics (supergroups with topics) now land in
the correct topic thread instead of 'General'.
- base.py: build thread_id metadata from event.source, pass to all
send/media calls; add metadata param to send_typing, send_image,
send_animation, send_voice, send_video, send_document, send_image_file,
_keep_typing
- telegram.py: extract thread_id from metadata and pass as
message_thread_id to all Bot API calls (send_photo, send_voice,
send_audio, send_animation, send_chat_action)
- run.py: pass thread_id metadata to progress/streaming send calls
- discord/slack/whatsapp/homeassistant: update send_typing signature
Based on the fix proposed by @Bitstreamono in PR #656.
a630ca15de