Add the BsaDomainRefresh entity (#2250)

Add the BsaDomainRefresh class which tracks the refresh actions.

The refresh actions checks for changes in the set of registered and
reserved domains, which are called unblockables to BSA.

db/src/main/resources/sql/schema/db-schema.sql.generated

@@ -93,6 +93,14 @@
         primary key (label, tld)
     );
 
+    create table "BsaDomainRefresh" (
+       job_id  bigserial not null,
+        creation_time timestamptz not null,
+        stage text not null,
+        update_timestamp timestamptz,
+        primary key (job_id)
+    );
+
     create table "BsaDownload" (
        job_id  bigserial not null,
         block_list_checksums text not null,