Add 9 more indexes to SQL schema (#1541)

* Add 9 more indexes to SQL schema

This indexes were identified as missing by PostgreSQL's query analyzer in our
sandbox environment (where we get enough realistic EPP traffic to identify these
deficiencies).

This is the first of two PRs -- the second PR (#1540) will be merged only after
this one is live in production. Note that this is the PR that actually modifies
the database though, so once this one is deployed we will already have the
benefit of the new indexes.

db/src/main/resources/sql/flyway/V106__add_missing_indexes_from_query_analyzer.sql

@@ -0,0 +1,27 @@
+-- Copyright 2022 The Nomulus Authors. All Rights Reserved.
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+
+CREATE INDEX IDX3y3k7m2bkgahm9sixiohgyrga ON "Domain" (transfer_billing_event_id);
+CREATE INDEX IDXsfci08jgsymxy6ovh4k7r358c ON "Domain" (billing_recurrence_id);
+CREATE INDEX IDXcju58vqascbpve1t7fem53ctl ON "Domain" (transfer_billing_recurrence_id);
+
+CREATE INDEX IDXjw3rwtfrexyq53x9vu7qghrdt ON "DomainHost" (host_repo_id);
+
+CREATE INDEX IDXbgssjudpm428mrv0xfpvgifps ON "GracePeriod" (billing_event_id);
+CREATE INDEX IDX5u5m6clpk3nktrvtyy5umacb6 ON "GracePeriod" (billing_recurrence_id);
+
+CREATE INDEX IDX6ebt3nwk5ocvnremnhnlkl6ff ON "BillingEvent" (cancellation_matching_billing_recurrence_id);
+
+CREATE INDEX IDX4ytbe5f3b39trsd4okx5ijhs4 ON "BillingCancellation" (billing_event_id);
+CREATE INDEX IDXku0fopwyvd57ebo8bf0jg9xo2 ON "BillingCancellation" (billing_recurrence_id);