Add type of verification to metric

dmnverifierapi/src/main/java/de/unikoblenz/fgbks/core/dmn/verification/metrics/Metric.java

@@ -55,14 +55,22 @@ public class Metric implements Serializable {
         / NANO_SECONDS_PER_SECOND;
   }
 
-  /**
-   * Get the total execution time in ns.
-   */
+  /** Get the total execution time in ns. */
   @JsonProperty("totalExecutionTime")
   public long getTotalExecutionTime() {
     return executionTimes.stream().mapToLong(Long::longValue).sum();
   }
 
+  /**
+   * Get the {@link VerificationType}.
+   *
+   * @return the {@link VerificationType}
+   */
+  @JsonProperty("type")
+  public VerificationType getType() {
+    return type;
+  }
+
   /**
    * Get the total execution time in ms.
    *