feat: add messageId to context

src/alice.ts

@@ -45,6 +45,7 @@ export class Alice implements IAlice {
       message: request.request.command,
       originalUtterance: request.request.original_utterance,
       sessionId: request.session.session_id,
+      messageId: request.session.message_id,
       userId: request.session.user_id,
       payload: request.request.payload,
     };

src/context.ts

@@ -5,6 +5,7 @@ export interface IContext {
   readonly message: string;
   readonly originalUtterance: string;
   readonly sessionId: string;
+  readonly messageId: number;
   readonly userId: string;
   readonly payload: object | undefined;
 }