refactor(core): Fix type errors in workflow, core, nodes-langchain, and nodes-base (no-changelog) (#9450)

packages/@n8n/nodes-langchain/nodes/memory/MemoryChatRetriever/MemoryChatRetriever.node.ts

@@ -98,7 +98,7 @@ export class MemoryChatRetriever implements INodeType {
 		const messages = await memory?.chatHistory.getMessages();
 
 		if (simplifyOutput && messages) {
-			return await this.prepareOutputData(simplifyMessages(messages));
+			return [simplifyMessages(messages)];
 		}
 
 		const serializedMessages =
@@ -107,6 +107,6 @@ export class MemoryChatRetriever implements INodeType {
 				return { json: serializedMessage as unknown as IDataObject };
 			}) ?? [];
 
-		return await this.prepareOutputData(serializedMessages);
+		return [serializedMessages];
 	}
 }