feat: enhance message context with full ID support for replies and caching

- Updated message processing to include full message IDs alongside short IDs for better context resolution.
- Improved reply handling by caching inbound messages, allowing for accurate sender and body resolution without exposing dropped content.
- Adjusted tests to validate the new full ID properties and their integration into the message handling workflow.

src/channels/plugins/types.core.ts

@@ -212,6 +212,7 @@ export type ChannelThreadingContext = {
   Channel?: string;
   To?: string;
   ReplyToId?: string;
+  ReplyToIdFull?: string;
   ThreadLabel?: string;
   MessageThreadId?: string | number;
 };