Enha: model name to config

config/config.go

@@ -12,6 +12,7 @@ type Config struct {
 	APIToken       string `toml:"APIToken"`
 	QuestionsPath  string `toml:"QuestionsPath"`
 	RPScenariosDir string `toml:"RPScenariosDir"`
+	ModelName      string `toml:"ModelName"`
 	OutDir         string `toml:"OutDir"`
 	MaxTurns       int    `toml:"MaxTurns"`
 }
@@ -30,6 +31,7 @@ func LoadConfigOrDefault(fn string) *Config {
 		config.RPScenariosDir = "scenarios"
 		config.OutDir = "results"
 		config.MaxTurns = 10
+		config.ModelName = "deepseek/deepseek-chat-v3-0324:free"
 	}
 	return config
 }