Fix Issue 3: Add 60s default timeout to OpenAI client

patches/openai_backend_init.py

@@ -0,0 +1,15 @@
+    def __init__(
+        self,
+        model: str = "gpt-4o",
+        base_url: str | None = None,
+        api_key: str | None = None,
+        timeout: float = 60.0,
+    ):
+        from openai import OpenAI
+
+        self.model = model
+        self.client = OpenAI(
+            base_url=base_url,
+            api_key=api_key or os.environ.get("OPENAI_API_KEY"),
+            timeout=timeout,
+        )