Fix tests and build

Author: spalmurray

src/services/events/__mocks__/events.ts

@@ -8,6 +8,7 @@ import { EventTracker } from '../types'
 //
 
 const MOCK_EVENT_TRACKER: EventTracker = {
+  context: {},
   identify: vi.fn(),
   track: vi.fn(),
   setContext: vi.fn(),

src/services/events/amplitude/amplitude.test.tsx

@@ -14,6 +14,7 @@ const mockAmplitude = vi.hoisted(() => {
     }
   }
   return {
+    add: vi.fn(),
     init: vi.fn(),
     track: vi.fn(),
     identify: vi.fn(),