feat: Events / audit log (#1008)

* feat: Record events in DB

* feat: events API

* First pass, hacky activity feed

* WIP

* Reset dashboard

* feat: audit log UI
feat: store ip address

* chore: Document events.list api

* fix: command specs

* await event create

* fix: backlinks service

* tidy

* fix: Hide audit log menu item if not admin

server/migrations/20190606035733-events.js

@@ -0,0 +1,35 @@
+module.exports = {
+  up: async (queryInterface, Sequelize) => {
+    await queryInterface.changeColumn('events', 'data', {
+      type: Sequelize.JSONB,
+      allowNull: true,
+    });
+    await queryInterface.addColumn('events', 'actorId', {
+      type: Sequelize.UUID,
+      allowNull: true,
+      references: {
+        model: 'users',
+      },
+    });
+    await queryInterface.addColumn('events', 'modelId', {
+      type: Sequelize.UUID,
+      allowNull: true
+    });
+    await queryInterface.addColumn('events', 'ip', {
+      type: Sequelize.STRING,
+      allowNull: true
+    });
+    await queryInterface.addIndex('events', ['name']);
+    await queryInterface.addIndex('events', ['actorId']);
+    await queryInterface.addIndex('events', ['teamId', 'collectionId']);
+  },
+  down: async (queryInterface, Sequelize) => {
+    await queryInterface.removeColumn('events', 'actorId');
+    await queryInterface.removeColumn('events', 'modelId');
+    await queryInterface.removeColumn('events', 'ip');
+
+    await queryInterface.removeIndex('events', ['name']);
+    await queryInterface.removeIndex('events', ['actorId']);
+    await queryInterface.removeIndex('events', ['teamId', 'collectionId']);
+  }
+}