added a dual ocr workflow

app.py

@@ -1236,7 +1236,7 @@ async def generate_html_from_dual_ocr(
             raise ValueError("GEMINI_API_KEY not found in environment variables.")
 
         genai.configure(api_key=api_key)
-        model = genai.GenerativeModel(model_name="gemini-1.5-flash")
+        model = genai.GenerativeModel(model_name="gemini-2.5-flash")
 
         prompt = f"""
         You have been provided with two different, translated OCR outputs for the same document.