Drop FKs referencing DomainHistory (#2621)

- We never delete rows from DomainHistory (and even if we do in the
  future, they'll be old / the references won't matter)
- This is likely creating lock contention when lots of requests come
  through at once for domains with many DomainHistory entries

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

@@ -941,12 +941,15 @@
     create index IDXqa3g92jc17e8dtiaviy4fet4x 
        on "BillingCancellation" (billing_time);
 
-    create index IDX4ytbe5f3b39trsd4okx5ijhs4 
+    create index IDX4muirjyj3kt8nx63nrjxigktk 
        on "BillingCancellation" (billing_event_id);
 
-    create index IDXku0fopwyvd57ebo8bf0jg9xo2 
+    create index IDXmfu2k59a54e0ttoxchwaci7qy 
        on "BillingCancellation" (billing_recurrence_id);
 
+    create index IDX7v75e535c47mxfb2rk9o843bn 
+       on "BillingCancellation" (domain_repo_id, domain_history_revision_id);
+
     create index IDXqspv57gj2led8ly42fq01t7m7 
        on "BillingEvent" (registrar_id);
 
@@ -965,9 +968,15 @@
     create index IDXcesda59ssop44kklytpb292hn 
        on "BillingEvent" (allocation_token);
 
-    create index IDX6ebt3nwk5ocvnremnhnlkl6ff 
+    create index IDX80375qd9haxrvwk8ovqmp3695 
        on "BillingEvent" (cancellation_matching_billing_recurrence_id);
 
+    create index IDX77ceolnf7rok8ui957msmo6en 
+       on "BillingEvent" (domain_repo_id, domain_history_revision_id);
+
+    create index IDXehp8ejwpbsooar0e8k32847m3 
+       on "BillingEvent" (domain_repo_id, recurrence_history_revision_id);
+
     create index IDXd3gxhkh0jk694pjvh9pyn7wjc 
        on "BillingRecurrence" (registrar_id);
 
@@ -983,9 +992,12 @@
     create index IDXp0pxi708hlu4n40qhbtihge8x 
        on "BillingRecurrence" (recurrence_last_expansion);
 
-    create index IDXjny8wuot75b5e6p38r47wdawu 
+    create index IDXbix949l2kfn9r03l6omyhi36f 
        on "BillingRecurrence" (recurrence_time_of_year);
 
+    create index IDXlh9lvmxb2dj3ti83buauwvbil 
+       on "BillingRecurrence" (domain_repo_id, domain_history_revision_id);
+
     create index IDXj874kw19bgdnkxo1rue45jwlw 
        on "BsaDownload" (creation_time);
 
@@ -1079,6 +1091,9 @@
     create index IDXhteajcrxmq4o8rsys8kevyiqr 
        on "Domain" (transfer_billing_cancellation_id);
 
+    create index IDXmk1d2ngdtfkg6odmw7l5ejisw 
+       on "DomainDsDataHistory" (domain_repo_id, domain_history_revision_id);
+
     create index IDXrh4xmrot9bd63o382ow9ltfig 
        on "DomainHistory" (creation_time);
 
@@ -1097,6 +1112,9 @@
     create index IDXjw3rwtfrexyq53x9vu7qghrdt 
        on "DomainHost" (host_repo_id);
 
+    create index IDX1dyqmqb61xbnj7mt7bk27ds25 
+       on "DomainTransactionRecord" (domain_repo_id, history_revision_id);
+
     create index IDXj1mtx98ndgbtb1bkekahms18w 
        on "GracePeriod" (domain_repo_id);
 
@@ -1109,6 +1127,9 @@
     create index IDXd01j17vrpjxaerxdmn8bwxs7s 
        on "GracePeriodHistory" (domain_repo_id);
 
+    create index IDXl67y6wclc2uaupepnvkoo81fl 
+       on "GracePeriodHistory" (domain_repo_id, domain_history_revision_id);
+
     create index IDXkpkh68n6dy5v51047yr6b0e9l 
        on "Host" (host_name);
 
@@ -1145,12 +1166,15 @@
     create index IDXf2q9dqj899h1q8lah5y719nxd 
        on "PollMessage" (domain_repo_id);
 
-    create index IDXe7wu46c7wpvfmfnj4565abibp 
+    create index IDXb75725p8js6987ubi8a7nhdqs 
        on "PollMessage" (registrar_id);
 
     create index IDXaydgox62uno9qx8cjlj5lauye 
        on "PollMessage" (event_time);
 
+    create index IDXnuyqo6hrtuvbcmuecf7vkfmle 
+       on "PollMessage" (domain_repo_id, domain_history_revision_id);
+
     create index premiumlist_name_idx 
        on "PremiumList" (name);