Add scale=0.9 to PDF generation for better A4 page fitting

app.py

@@ -64,7 +64,8 @@ async def html_to_pdf_api(html_content: str) -> tuple[str, str]:
                     path=temp_path,
                     format="A4",
                     print_background=True,
-                    margin={"top":"15mm","bottom":"15mm","left":"15mm","right":"15mm"}
+                    margin={"top":"15mm","bottom":"15mm","left":"15mm","right":"15mm"},
+                    scale=0.9  # 90%に縮小してA4 2ページに収める
                 )
                 
                 await browser.close()