Telegram plugin: inbound MCP notifications not reaching session on Windows

Description

The Telegram channel plugin (v0.0.4) receives inbound messages via grammy polling but the MCP notifications (notifications/claude/channel) never reach the Claude Code session. Outbound messaging (reply tool) works fine.

Environment

• Windows 11 Home 10.0.26200
• Claude Code v2.1.83
• Telegram plugin v0.0.4
• Runtime: bun

Steps to reproduce

1. Configure Telegram bot token in ~/.claude/channels/telegram/.env
2. Add sender ID to allowlist in access.json (dmPolicy: "allowlist")
3. Reload plugins (/reload-plugins)
4. Send a message from Telegram to the bot

Expected behavior

Message appears in the Claude Code session as a channel notification.

Actual behavior

• Bot polls Telegram successfully (confirmed via getUpdates after killing bun)
• Messages are received by the bot (verified by pulling updates directly via curl)
• notifications/claude/channel is called in server.ts but never surfaces in the session
• Outbound replies via the reply MCP tool work correctly
• Two bun processes spawn on reload; the polling slot is always held (409 Conflict on manual getUpdates)

Debugging done

• Verified bot token is valid (getMe returns correct bot info)
• Verified sender ID is on the allowlist
• Killed all bun processes and confirmed messages exist via getUpdates
• Deleted webhook and dropped pending updates
• Multiple plugin reloads attempted
• Switched between pairing and allowlist policies -- no difference