1.1.5: fix activation analytics blind spots + purchase environment tagging

- dish_added now carries a `source` param; onboarding-created dishes fire
  it with source="onboarding" (previously untracked, undercounting activation)
- onboarding_completed now reports dish_count
- premium_purchased tagged with StoreKit environment (production/sandbox/xcode)
  so test purchases can be excluded from conversion metrics
- add .gitignore to keep signing secrets (.p12/.cer/.mobileprovision) and
  build artifacts out of the repo
- document branch↔MARKETING_VERSION naming convention

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UtWT52pAE91D7mbDda1cAM

MealMood/ViewModels/OnboardingViewModel.swift

@@ -147,6 +147,7 @@ final class OnboardingViewModel: ObservableObject {
             context.insert(dish)
         }
         let createdDishes = !addedDishes.isEmpty
+        let onboardingDishCount = addedDishes.count
 
         // Create first week plan
         let weekStart = Date().startOfWeek()
@@ -154,7 +155,12 @@ final class OnboardingViewModel: ObservableObject {
 
         do {
             try context.save()
-            AnalyticsService.logOnboardingCompleted()
+            // Dishes created inside onboarding didn't previously fire dish_added,
+            // so activation looked lower than it was. Emit one per dish, tagged.
+            for dishData in addedDishes {
+                AnalyticsService.logDishAdded(tagCount: dishData.tagIds.count, source: "onboarding")
+            }
+            AnalyticsService.logOnboardingCompleted(dishCount: onboardingDishCount)
             // If the user added dishes, auto-fill their first week on launch so they
             // land on a ready plan instead of an empty one. Otherwise fall back to the
             // home auto-assign prompt.