Add missing database indexes for hooks.unfurl endpoint (#10870)

* Initial plan

* Add database indexes to improve hooks.unfurl performance

Co-authored-by: tommoor <380914+tommoor@users.noreply.github.com>

* Verify migrations and query plans for new indexes

Co-authored-by: tommoor <380914+tommoor@users.noreply.github.com>

* Address code review feedback: improve migration rollback order and add comments

Co-authored-by: tommoor <380914+tommoor@users.noreply.github.com>

* Change index column order to teamId first as requested

Co-authored-by: tommoor <380914+tommoor@users.noreply.github.com>

* Update .env.test

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: tommoor <380914+tommoor@users.noreply.github.com>
Co-authored-by: Tom Moor <tom@getoutline.com>

.env.test

@@ -12,6 +12,7 @@ GOOGLE_CLIENT_SECRET=123
 
 SLACK_CLIENT_ID=123
 SLACK_CLIENT_SECRET=123
+SLACK_VERIFICATION_TOKEN=test-token-123
 
 GITHUB_CLIENT_ID=123;
 GITHUB_CLIENT_SECRET=123;

server/migrations/20251212232400-add-authentications-service-teamid-index.js

@@ -0,0 +1,16 @@
+"use strict";
+
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    await queryInterface.addIndex("authentications", ["teamId", "service"], {
+      name: "authentications_team_id_service",
+    });
+  },
+
+  async down(queryInterface, Sequelize) {
+    await queryInterface.removeIndex(
+      "authentications",
+      "authentications_team_id_service"
+    );
+  },
+};

server/migrations/20251212232500-add-integrations-service-type-settings-indexes.js

@@ -0,0 +1,27 @@
+"use strict";
+
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    // Add composite index on service and type for better filtering
+    await queryInterface.addIndex("integrations", ["service", "type"], {
+      name: "integrations_service_type",
+    });
+
+    // Add GIN index on settings for JSONB queries
+    // Using raw SQL as Sequelize doesn't support GIN index type natively
+    await queryInterface.sequelize.query(
+      'CREATE INDEX "integrations_settings_gin" ON "integrations" USING GIN ("settings");'
+    );
+  },
+
+  async down(queryInterface, Sequelize) {
+    // Drop indexes in reverse order of creation
+    await queryInterface.sequelize.query(
+      'DROP INDEX IF EXISTS "integrations_settings_gin";'
+    );
+    await queryInterface.removeIndex(
+      "integrations",
+      "integrations_service_type"
+    );
+  },
+};