HDDS-14003. EventNotification: Added protobufs and entity class for storing the ledger of completed requests

Author: Colm Dougan

hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/OzoneConsts.java

@@ -552,6 +552,11 @@ public final class OzoneConsts {
   public static final String COMPACTION_LOG_TABLE =
       "compactionLogTable";
 
+  /**
+   * DB completed request info table name. Referenced in RDBStore.
+   */
+  public static final String COMPLETED_REQUEST_INFO_TABLE = "completedRequestInfoTable";
+
   /**
    * S3G multipart upload request's ETag header key.
    */