Fix auth delete when GitHub App installed (#2904)

Add missing cascade delete

database/migrations/000044_github_installation_cascade_delete.down.sql

@@ -0,0 +1,25 @@
+-- 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;
+
+ALTER TABLE provider_github_app_installations
+    DROP CONSTRAINT provider_github_app_installations_project_id_fkey;
+
+ALTER TABLE provider_github_app_installations
+    ADD CONSTRAINT provider_github_app_installations_project_id_fkey
+        FOREIGN KEY (project_id)
+            REFERENCES projects(id);
+
+COMMIT;

database/migrations/000044_github_installation_cascade_delete.up.sql

@@ -0,0 +1,28 @@
+-- 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;
+
+-- drop the existing foreign key constraint on project_id
+ALTER TABLE provider_github_app_installations
+    DROP CONSTRAINT provider_github_app_installations_project_id_fkey;
+
+-- create a new foreign key constraint on project_id with ON DELETE CASCADE
+ALTER TABLE provider_github_app_installations
+    ADD CONSTRAINT provider_github_app_installations_project_id_fkey
+        FOREIGN KEY (project_id)
+            REFERENCES projects(id)
+            ON DELETE CASCADE;
+
+COMMIT;