Bug Description

The DiscordGuildChannelConfig type in types.discord.ts is missing the autoThread field, even though:

1. The Zod schema (DiscordGuildChannelSchema) includes autoThread: z.boolean().optional() at line 358
2. Runtime code actively uses it in threading.ts:370, message-handler.process.ts:257, and allow-list.ts:501
3. The runtime code in allow-list.ts had to define its own local type with autoThread?: boolean (line 41) to work around the missing canonical type field

Impact

• Type safety gap: the canonical type doesn't reflect a field that the schema validates and runtime reads
• Code in allow-list.ts maintains a shadow type definition that could drift from the canonical type

Root Cause

Type/schema drift: autoThread was added to the Zod schema and runtime code but not to the canonical TypeScript type in types.discord.ts.