fix(deepseek): add 'as const' assertion to DEEPSEEK_MODELS for correct TypeScript inference (#2148)

Co-authored-by: Marcus Schiesser <marcus.schiesser@googlemail.com>

Author: abdeliibrahim

.changeset/two-pigs-deliver.md

@@ -0,0 +1,5 @@
+---
+"@llamaindex/deepseek": patch
+---
+
+fix: contextwindow metadata

packages/providers/deepseek/src/llm.ts

@@ -4,7 +4,7 @@ import { OpenAI } from "@llamaindex/openai";
 export const DEEPSEEK_MODELS = {
   "deepseek-coder": { contextWindow: 128000 },
   "deepseek-chat": { contextWindow: 128000 },
-};
+} as const;
 
 type DeepSeekModelName = keyof typeof DEEPSEEK_MODELS;
 const DEFAULT_MODEL: DeepSeekModelName = "deepseek-coder";