Salvaged from PR #1146 by spanishflu-est1918.
Background process progress/completion messages were sent with only
chat_id, landing in the general topic instead of the originating forum
topic. Thread the thread_id from HERMES_SESSION_THREAD_ID through the
watcher payload and pass it as metadata to adapter.send() so Telegram
routes notifications to the correct topic.
The env var export (HERMES_SESSION_THREAD_ID in _set_session_env /
_clear_session_env) already existed on main — this commit adds the
missing watcher plumbing.
Co-authored-by: spanishflu-est1918 <spanishflu-est1918@users.noreply.github.com>
4298c6fd9a