Problem

Forum topic lifecycle events (forum_topic_created, forum_topic_edited, forum_topic_closed, forum_topic_reopened) were never processed by the gateway because they are delivered as service messages — they carry neither text nor media content. The existing handler registration only covered TEXT, COMMAND, LOCATION, and MEDIA filters, so these events were silently dropped.

The auto-discovery logic added in _build_message_event (checking message.forum_topic_created) was unreachable because no handler filtered for service message types.

Root Cause

# Existing handlers — none match service messages
self._app.add_handler(TelegramMessageHandler(filters.TEXT & ~filters.COMMAND, ...))
self._app.add_handler(TelegramMessageHandler(filters.COMMAND, ...))
self._app.add_handler(TelegramMessageHandler(filters.LOCATION | ..., ...))
self._app.add_handler(TelegramMessageHandler(filters.PHOTO | filters.VIDEO | ..., ...))

forum_topic_created messages have no .text, no media — they only have the .forum_topic_created attribute. None of the registered filters match, so the update is discarded.

Fix

Add a dedicated MessageHandler filtered on filters.StatusUpdate.FORUM_TOPIC_CREATED | FORUM_TOPIC_EDITED | FORUM_TOPIC_CLOSED | FORUM_TOPIC_REOPENED that directly calls _persist_group_topic / _persist_group_topic_edit.

This ensures:

• New topics are auto-registered in config.yaml immediately when created by any admin (not just the bot)
• Topic renames are tracked
• Topic close/reopen status is persisted
• Works for all group forum events regardless of who triggers them

Changes

• Added _handle_forum_topic_event handler with filters.StatusUpdate.FORUM_TOPIC_* filters
• Handler directly calls existing _persist_group_topic / _persist_group_topic_edit methods
• Includes full group forum topic infrastructure from prior work:
  • _group_topics_config init
  • _persist_group_topic, _persist_group_topic_edit
  • _get_group_topic_info, _reload_group_topics_from_config
  • Topic name/skill/role resolution in _build_message_event

Testing

Confirmed on live Telegram group:

1. Bot created topic via API → no forum_topic_created event received (Telegram behavior — no echo to self)
2. Human admin created topic → event received and auto-registered with the fix
3. Without the fix: zero forum topic events reached _build_message_event (verified in gateway logs)