Fix boundary bugs, route side effects through MoodLogger, add data listeners

- Fix ExtensionDataProvider <= boundary to < in date queries (prevented cross-day leaks)
- Replace force-unwraps with guards and add error logging in DataControllerGET and ExtensionDataProvider
- Route DayViewViewModel update/delete through MoodLogger.shared (was duplicating side effects)
- Add data listeners to InsightsViewModel and YearViewModel for cross-tab refresh
- Add HealthKitManager.deleteMood(for:) for single-date cleanup
- Add SharedModelContainer.isUsingInMemoryFallback flag with critical logging
- Add analytics events: entryDeleted, allDataCleared, duplicatesRemoved, storageFallbackActivated

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Shared/HealthKitManager.swift

@@ -311,6 +311,38 @@ class HealthKitManager: ObservableObject {
         return deletedCount
     }
 
+    // MARK: - Delete Mood for Date from HealthKit
+
+    /// Deletes State of Mind samples created by this app for a specific date
+    /// Note: HealthKit only allows deleting samples that your app created
+    func deleteMood(for date: Date) async throws {
+        guard isHealthKitAvailable else {
+            throw HealthKitError.notAvailable
+        }
+
+        guard let stateOfMindType = stateOfMindType else {
+            throw HealthKitError.typeNotAvailable
+        }
+
+        guard checkAuthorizationStatus() == .sharingAuthorized else {
+            throw HealthKitError.notAuthorized
+        }
+
+        let calendar = Calendar.current
+        let dayStart = calendar.startOfDay(for: date)
+        guard let dayEnd = calendar.date(byAdding: .day, value: 1, to: dayStart) else { return }
+
+        let samples = try await fetchMoods(from: dayStart, to: dayEnd)
+
+        guard !samples.isEmpty else {
+            logger.info("No State of Mind samples found for \(date) to delete")
+            return
+        }
+
+        try await healthStore.delete(samples)
+        logger.info("Deleted \(samples.count) State of Mind samples for \(date)")
+    }
+
     // MARK: - Read Mood from HealthKit
 
     func fetchMoods(from startDate: Date, to endDate: Date) async throws -> [HKStateOfMind] {