track cloud-specific onboarding events and add performance optimizations for hosted cloud app (#6158)

## Summary
- Complete telemetry implementation with circular dependency fix
- Add build performance optimizations from main branch

### Telemetry Features
- ✅ Final telemetry events: signup opened, survey flow, email
verification
- ✅ Onboarding mode to prevent circular dependencies during app
initialization
- ✅ Lazy composable loading with dynamic imports for workflow tracking
- ✅ Survey responses as both event properties and persistent user
properties
- ✅ User identification method for onboarding flow
- ✅ Deferred user property setting until user is authenticated

### Performance Optimizations  
- ✅ Tree-shaking enabled to remove unused code
- ✅ Manual chunk splitting for vendor libraries (primevue, vue, tiptap,
chart.js, etc.)
- ✅ Enhanced esbuild minification with console removal in production
builds
- ✅ GENERATE_SOURCEMAP environment variable control
- ✅ Maintained ImportMap disabled for cloud performance

## Test plan
- [x] Telemetry events track correctly in Mixpanel
- [x] No circular dependency errors on app startup
- [x] Survey responses appear as both event properties and user
properties
- [x] Build optimizations reduce bundle size and improve loading
performance
- [x] All lint/format/typecheck passes

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6158-track-cloud-specific-onboarding-events-and-add-performance-optimizations-for-hosted-cloud-2926d73d365081a7b533dde249d5f734)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Claude <noreply@anthropic.com>

src/platform/onboarding/cloud/CloudVerifyEmailView.vue

@@ -40,6 +40,8 @@ import { useI18n } from 'vue-i18n'
 import { useRoute, useRouter } from 'vue-router'
 import { useFirebaseAuth } from 'vuefire'
 
+import { isCloud } from '@/platform/distribution/types'
+import { useTelemetry } from '@/platform/telemetry'
 import { useToastStore } from '@/platform/updates/common/toastStore'
 import { useFirebaseAuthStore } from '@/stores/firebaseAuthStore'
 
@@ -106,6 +108,12 @@ const goBack = async () => {
 async function onSend() {
   try {
     await authStore.verifyEmail()
+
+    // Track email verification requested
+    if (isCloud) {
+      useTelemetry()?.trackEmailVerification('requested')
+    }
+
     useToastStore().add({
       severity: 'success',
       summary: t('cloudVerifyEmail_toast_success', {
@@ -121,6 +129,11 @@ async function onSend() {
 }
 
 onMounted(async () => {
+  // Track email verification screen opened
+  if (isCloud) {
+    useTelemetry()?.trackEmailVerification('opened')
+  }
+
   // If the user is already verified (email link already clicked),
   // continue to the next step automatically.
   if (authStore.isEmailVerified) {
@@ -135,6 +148,10 @@ onMounted(async () => {
     if (auth.currentUser && !redirectInProgress.value) {
       await auth.currentUser.reload()
       if (auth.currentUser?.emailVerified) {
+        // Track email verification completed
+        if (isCloud) {
+          useTelemetry()?.trackEmailVerification('completed')
+        }
         void redirectToNextStep()
       }
     }