Added a configurable timeout knob

internal/profile/filesystem_repository.go

@@ -107,6 +107,9 @@ func validateProfile(p *domain.PromptProfile) error {
 	if p.Validation.ValidationMode == domain.ValidationJSONSchema && strings.TrimSpace(p.Validation.SchemaPath) == "" {
 		return errors.New("validation.schema_path is required when validation_mode is json_schema")
 	}
+	if p.ModelDefaults.TimeoutSeconds < 0 {
+		return errors.New("model_defaults.timeout_seconds must be greater than or equal to 0")
+	}
 	if p.Validation.Format != "" && p.Validation.Format != p.OutputFormat {
 		return fmt.Errorf("validation format %q does not match output format %q", p.Validation.Format, p.OutputFormat)
 	}