The #22773 heuristic classified any telegram:<positive_chat_id>:<numeric_thread_id>
cron target as a Bot API channel Direct-Messages topic and routed it via
direct_messages_topic_id, which nulls message_thread_id. A normal forum-style
topic inside a private chat has the identical shape, so every such cron
delivery landed in General instead of the target thread (#52060). It also
means the only way to address a genuine channel DM topic was this same
ambiguous guess.
Disambiguate with the real runtime signal instead: probe the live adapter's
get_chat_info once and route via direct_messages_topic_id only when the chat
is actually a channel; everything else (private forum topic, forum supergroup,
group) and any probe failure fall back to message_thread_id — parity with
0.16.0 and with live reply routing. This fixes forum-topic delivery AND makes
genuine channel DM-topic cron delivery work correctly.
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