fix: resolve TODO in to make model more dynamic and generic

Author: harperaa

packages/client-discord/src/actions/chat_with_attachments.ts

@@ -1,5 +1,6 @@
 import { composeContext } from "@elizaos/core";
 import { generateText, trimTokens } from "@elizaos/core";
+import type { TiktokenModel } from "js-tiktoken";
 import { models } from "@elizaos/core";
 import { parseJSONObjectFromText } from "@elizaos/core";
 import {
@@ -194,10 +195,12 @@ const summarizeAction = {
         const context = composeContext({
             state,
             // make sure it fits, we can pad the tokens a bit
+            // Get the model's tokenizer based on the current model being used
             template: trimTokens(
                 summarizationTemplate,
                 chunkSize + 500,
-                "gpt-4o-mini" // TODO: make this dynamic and generic
+                (model.model[ModelClass.SMALL] ||
+                    "gpt-4o-mini") as TiktokenModel // Use the same model as generation; Fallback if no SMALL model configured
             ),
         });