Export entity integrity alerts to BigQuery

This is part 2 of a longer series.  Part 3 will add lots more tests, will add a cron entry, and will include an analysis script to run on BigQuery to detect the presence of two consecutive errors.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=120040267

java/com/google/domain/registry/model/index/EppResourceIndex.java

@@ -42,6 +42,14 @@ public class EppResourceIndex extends BackupGroupRoot {
   @Index
   String kind;
 
+  public String getId() {
+    return id;
+  }
+
+  public String getKind() {
+    return kind;
+  }
+
   public Ref<? extends EppResource> getReference() {
     return reference;
   }