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/Persisence/DataControllerGET.swift

@@ -7,11 +7,17 @@
 
 import SwiftData
 import Foundation
+import os.log
+
+private let logger = Logger(subsystem: Bundle.main.bundleIdentifier ?? "com.tt.feels", category: "DataControllerGET")
 
 extension DataController {
     func getEntry(byDate date: Date) -> MoodEntryModel? {
         let startDate = Calendar.current.startOfDay(for: date)
-        let endDate = Calendar.current.date(byAdding: .day, value: 1, to: startDate)!
+        guard let endDate = Calendar.current.date(byAdding: .day, value: 1, to: startDate) else {
+            logger.error("Failed to calculate end date for getEntry")
+            return nil
+        }
 
         var descriptor = FetchDescriptor<MoodEntryModel>(
             predicate: #Predicate { entry in
@@ -21,7 +27,12 @@ extension DataController {
         )
         descriptor.fetchLimit = 1
 
-        return try? modelContext.fetch(descriptor).first
+        do {
+            return try modelContext.fetch(descriptor).first
+        } catch {
+            logger.error("Failed to fetch entry: \(error.localizedDescription)")
+            return nil
+        }
     }
 
     func getData(startDate: Date, endDate: Date, includedDays: [Int]) -> [MoodEntryModel] {
@@ -36,7 +47,12 @@ extension DataController {
             sortBy: [SortDescriptor(\.forDate, order: .forward)]
         )
 
-        return (try? modelContext.fetch(descriptor)) ?? []
+        do {
+            return try modelContext.fetch(descriptor)
+        } catch {
+            logger.error("Failed to fetch entries: \(error.localizedDescription)")
+            return []
+        }
     }
 
     /// Calculate the current mood streak efficiently using a single batch query.