feat: add claude-opus-4-5-20251101 ratio

setting/ratio_setting/model_ratio.go

@@ -143,6 +143,7 @@ var defaultModelRatio = map[string]float64{
 	"claude-3-7-sonnet-20250219-thinking":       1.5,
 	"claude-sonnet-4-20250514":                  1.5,
 	"claude-sonnet-4-5-20250929":                1.5,
+	"claude-opus-4-5-20251101":                  2.5,
 	"claude-3-opus-20240229":                    7.5, // $15 / 1M tokens
 	"claude-opus-4-20250514":                    7.5,
 	"claude-opus-4-1-20250805":                  7.5,