Centralize execution setting and session validation

internal/profile/filesystem_repository.go

@@ -197,18 +197,10 @@ func validateProfile(p *domain.ExecutionProfile) error {
 		return errors.New("model is required")
 	}
 
-	if p.Temperature < 0 || p.Temperature > 2 {
-		return errors.New("temperature must be between 0 and 2")
-	}
-	if p.MaxTokens < 0 {
-		return errors.New("max_tokens must be greater than or equal to 0")
-	}
-	if p.TopP < 0 || p.TopP > 1 {
-		return errors.New("top_p must be between 0 and 1")
-	}
-	if p.TimeoutSeconds < 0 {
-		return errors.New("timeout_seconds must be greater than or equal to 0")
-	}
-
-	return nil
+	return domain.ValidateExecutionTargetSettings(domain.ExecutionTarget{
+		Temperature:    p.Temperature,
+		MaxTokens:      p.MaxTokens,
+		TopP:           p.TopP,
+		TimeoutSeconds: p.TimeoutSeconds,
+	})
 }