Telegram plugin consumes messages but doesn't surface them in conversation

Bug Description

The Telegram channel plugin consumes inbound messages (confirmed via 409 conflict on getUpdates) but notifications/claude/channel notifications never surface in the conversation as <channel> tags.

This appears to be the same issue reported in multiple existing issues:

• #36431
• #36802
• #37933
• #40604
• #40729
• #41733

Diagnostic Details

• Bot token: Valid — getMe returns correct bot info
• Bot can send: Confirmed — sendMessage API call delivers messages, and the reply MCP tool works
• Plugin is polling: Confirmed — getUpdates returns 409 Conflict: terminated by other getUpdates request
• access.json: Correctly configured with user's Telegram ID in allowFrom
• pending_update_count: 0 (plugin is consuming updates)
• MCP tools: Loaded and functional (reply, react, edit all work)
• Restarts: 9+ session restarts with no change

Environment

• macOS (Darwin 25.3.0)
• Claude Code 2.1.92
• Bun 1.3.11
• MCP SDK 1.27.1
• Telegram plugin 0.0.4

🤖 Filed with Claude Code