Remove the concept of a TransferData abstract class (#2966)

The only type of thing that can be transferred now is a domain, so
there's no point in having this abstract class / redirection.

This does not include deletion of the contact-response-related XML
classes; that can come next.

db/src/main/resources/sql/er_diagram/brief_er_diagram.html

@@ -261,7 +261,7 @@ td.section {
     </tr>
     <tr>
      <td class="property_name">generated on</td>
-     <td class="property_value">2026-02-20 05:51:31</td>
+     <td class="property_value">2026-02-20 20:45:48</td>
     </tr>
     <tr>
      <td class="property_name">last flyway file</td>
@@ -273,7 +273,7 @@ td.section {
   <p>&nbsp;</p>
   <svg viewBox="0.00 0.00 4846.00 3765.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="erDiagram" style="overflow: hidden; width: 100%; height: 800px">
    <g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 3761)">
-    <title>SchemaCrawler_Diagram</title> <polygon fill="white" stroke="transparent" points="-4,4 -4,-3761 4842,-3761 4842,4 -4,4" /> <text text-anchor="start" x="4598" y="-29.8" font-family="Helvetica,sans-Serif" font-size="14.00">generated by</text> <text text-anchor="start" x="4681" y="-29.8" font-family="Helvetica,sans-Serif" font-size="14.00">SchemaCrawler 16.27.1</text> <text text-anchor="start" x="4597" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">generated on</text> <text text-anchor="start" x="4681" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">2026-02-20 05:51:31</text> <polygon fill="none" stroke="#888888" points="4594,-4 4594,-44 4830,-44 4830,-4 4594,-4" /> <!-- allocationtoken_a08ccbef -->
+    <title>SchemaCrawler_Diagram</title> <polygon fill="white" stroke="transparent" points="-4,4 -4,-3761 4842,-3761 4842,4 -4,4" /> <text text-anchor="start" x="4598" y="-29.8" font-family="Helvetica,sans-Serif" font-size="14.00">generated by</text> <text text-anchor="start" x="4681" y="-29.8" font-family="Helvetica,sans-Serif" font-size="14.00">SchemaCrawler 16.27.1</text> <text text-anchor="start" x="4597" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">generated on</text> <text text-anchor="start" x="4681" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">2026-02-20 20:45:48</text> <polygon fill="none" stroke="#888888" points="4594,-4 4594,-44 4830,-44 4830,-4 4594,-4" /> <!-- allocationtoken_a08ccbef -->
     <g id="node1" class="node">
      <title>allocationtoken_a08ccbef</title> <polygon fill="#e9c2f2" stroke="transparent" points="525.5,-1272 525.5,-1291 711.5,-1291 711.5,-1272 525.5,-1272" /> <text text-anchor="start" x="527.5" y="-1278.8" font-family="Helvetica,sans-Serif" font-weight="bold" font-style="italic" font-size="14.00">public."AllocationToken"</text> <polygon fill="#e9c2f2" stroke="transparent" points="711.5,-1272 711.5,-1291 785.5,-1291 785.5,-1272 711.5,-1272" /> <text text-anchor="start" x="746.5" y="-1277.8" font-family="Helvetica,sans-Serif" font-size="14.00">[table]</text> <text text-anchor="start" x="527.5" y="-1259.8" font-family="Helvetica,sans-Serif" font-weight="bold" font-style="italic" font-size="14.00">token</text> <text text-anchor="start" x="705.5" y="-1258.8" font-family="Helvetica,sans-Serif" font-size="14.00"> </text> <text text-anchor="start" x="713.5" y="-1258.8" font-family="Helvetica,sans-Serif" font-size="14.00">text not null</text> <text text-anchor="start" x="527.5" y="-1239.8" font-family="Helvetica,sans-Serif" font-size="14.00">domain_name</text> <text text-anchor="start" x="705.5" y="-1239.8" font-family="Helvetica,sans-Serif" font-size="14.00"> </text> <text text-anchor="start" x="713.5" y="-1239.8" font-family="Helvetica,sans-Serif" font-size="14.00">text</text> <text text-anchor="start" x="527.5" y="-1220.8" font-family="Helvetica,sans-Serif" font-size="14.00">redemption_domain_repo_id</text> <text text-anchor="start" x="705.5" y="-1220.8" font-family="Helvetica,sans-Serif" font-size="14.00"> </text> <text text-anchor="start" x="713.5" y="-1220.8" font-family="Helvetica,sans-Serif" font-size="14.00">text</text> <text text-anchor="start" x="527.5" y="-1201.8" font-family="Helvetica,sans-Serif" font-size="14.00">token_type</text> <text text-anchor="start" x="705.5" y="-1201.8" font-family="Helvetica,sans-Serif" font-size="14.00"> </text> <text text-anchor="start" x="713.5" y="-1201.8" font-family="Helvetica,sans-Serif" font-size="14.00">text</text> <polygon fill="none" stroke="#888888" points="524.5,-1195.5 524.5,-1292.5 786.5,-1292.5 786.5,-1195.5 524.5,-1195.5" />
     </g>

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

@@ -206,20 +206,20 @@
         tech_contact text,
         tld text,
         transfer_billing_cancellation_id bigint,
+        transfer_history_entry_id bigint,
+        transfer_poll_message_id_1 bigint,
+        transfer_poll_message_id_2 bigint,
+        transfer_poll_message_id_3 bigint,
+        transfer_repo_id text,
         transfer_billing_recurrence_id bigint,
         transfer_autorenew_poll_message_id bigint,
         transfer_autorenew_poll_message_history_id bigint,
         transfer_billing_event_id bigint,
         transfer_renew_period_unit text check (transfer_renew_period_unit in ('YEARS','MONTHS')),
         transfer_renew_period_value integer,
-        transfer_registration_expiration_time timestamp(6) with time zone,
-        transfer_history_entry_id bigint,
-        transfer_poll_message_id_1 bigint,
-        transfer_poll_message_id_2 bigint,
-        transfer_poll_message_id_3 bigint,
-        transfer_repo_id text,
         transfer_client_txn_id text,
         transfer_server_txn_id text,
+        transfer_registration_expiration_time timestamp(6) with time zone,
         transfer_gaining_registrar_id text,
         transfer_losing_registrar_id text,
         transfer_pending_expiration_time timestamp(6) with time zone,
@@ -278,20 +278,20 @@
         tech_contact text,
         tld text,
         transfer_billing_cancellation_id bigint,
+        transfer_history_entry_id bigint,
+        transfer_poll_message_id_1 bigint,
+        transfer_poll_message_id_2 bigint,
+        transfer_poll_message_id_3 bigint,
+        transfer_repo_id text,
         transfer_billing_recurrence_id bigint,
         transfer_autorenew_poll_message_id bigint,
         transfer_autorenew_poll_message_history_id bigint,
         transfer_billing_event_id bigint,
         transfer_renew_period_unit text check (transfer_renew_period_unit in ('YEARS','MONTHS')),
         transfer_renew_period_value integer,
-        transfer_registration_expiration_time timestamp(6) with time zone,
-        transfer_history_entry_id bigint,
-        transfer_poll_message_id_1 bigint,
-        transfer_poll_message_id_2 bigint,
-        transfer_poll_message_id_3 bigint,
-        transfer_repo_id text,
         transfer_client_txn_id text,
         transfer_server_txn_id text,
+        transfer_registration_expiration_time timestamp(6) with time zone,
         transfer_gaining_registrar_id text,
         transfer_losing_registrar_id text,
         transfer_pending_expiration_time timestamp(6) with time zone,