Fix migrated column on rule evaluations (#4102)

After testing in staging, I found that the migration to set the
`migrated` column did not work as expected. The intention was that any rows in
`rule_evaluations` which have the same combination of rule instance ids
and entity ids should be marked as migrated, as they refer to the same
evaluations. This migration addresses this problem.

Tested against staging (with a rollback)

database/migrations/000087_set_migrated_flag_rule_evaluations.down.sql

@@ -0,0 +1,15 @@
+-- Copyright 2024 Stacklok, Inc
+--
+-- 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.
+
+-- Nothing to undo

database/migrations/000087_set_migrated_flag_rule_evaluations.up.sql

@@ -0,0 +1,41 @@
+-- Copyright 2024 Stacklok, Inc
+--
+-- 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.
+
+BEGIN;
+
+UPDATE rule_evaluations AS re
+SET migrated = TRUE
+FROM evaluation_rule_entities AS ere
+WHERE re.entity = 'pull_request'::entities
+  AND ere.entity_type = 'pull_request'::entities
+  AND ere.pull_request_id = re.pull_request_id
+  AND re.migrated = FALSE;
+
+UPDATE rule_evaluations AS re
+SET migrated = TRUE
+FROM evaluation_rule_entities AS ere
+WHERE re.entity = 'artifact'::entities
+  AND ere.entity_type = 'artifact'::entities
+  AND ere.artifact_id = re.artifact_id
+  AND re.migrated = FALSE;
+
+UPDATE rule_evaluations AS re
+SET migrated = TRUE
+FROM evaluation_rule_entities AS ere
+WHERE re.entity = 'repository'::entities
+  AND ere.entity_type = 'repository'::entities
+  AND ere.repository_id = re.repository_id
+  AND re.migrated = FALSE;
+
+COMMIT;