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/bigquery/BigqueryFactory.java

@@ -41,6 +41,8 @@ import com.google.domain.registry.util.NonFinalForTesting;
 import java.io.IOException;
 import java.util.Set;
 
+import javax.inject.Inject;
+
 /** Factory for creating {@link Bigquery} connections. */
 public class BigqueryFactory {
 
@@ -57,6 +59,8 @@ public class BigqueryFactory {
   @VisibleForTesting
   Subfactory subfactory = new Subfactory();
 
+  @Inject public BigqueryFactory() {}
+
   /** This class is broken out solely so that it can be mocked inside of tests. */
   static class Subfactory {