feat: OpenAI 모델을 gpt-5-mini에서 gpt-5-codex로 변경

Author: kim-the9

action/index.cjs

@@ -150957,7 +150957,7 @@ Diff 형식: '-' 삭제, '+' 추가, 나머지 맥락.
                     content: prompt,
                 },
             ],
-            model: "gpt-5-mini",
+            model: "gpt-5-codex",
             temperature: 1,
             top_p: +(process.env.top_p || 0) || 1,
             max_completion_tokens: process.env.max_tokens ? +process.env.max_tokens : undefined,

src/chat.ts

@@ -107,7 +107,7 @@ Diff 형식: '-' 삭제, '+' 추가, 나머지 맥락.
           content: prompt,
         },
       ],
-      model: "gpt-5-mini",
+      model: "gpt-5-codex",
       temperature: 1,
       top_p: +(process.env.top_p || 0) || 1,
       max_completion_tokens: process.env.max_tokens ? +process.env.max_tokens : undefined,