Workouts 2.0: re-base persistence on iCloud Drive documents

Replace Core Data + NSPersistentCloudKitContainer + App-Group store +
WatchConnectivity dictionary sync with the QuickRabbit iCloud-documents
architecture:

- iCloud Drive JSON documents are the sole source of truth (one file per
  aggregate: Splits/<ULID>.json, Workouts/YYYY/MM/<ULID>.json), with a
  rebuildable SwiftData cache populated only by an NSMetadataQuery observer
  and a connect-time reconcile. Soft-delete tombstones; hard iCloud gate.
- Shared model layer (ULID, Codable *Documents + stateless mappers, @Model
  cache entities, SwiftData container) compiled into both targets.
- New iPhone<->Watch bridge over WatchConnectivity keyed by ULIDs; the phone
  is the sole writer of iCloud Drive, the watch round-trips documents.
- AppServices DI + iCloud-required root gate; Swift 6 strict concurrency.
- Starter splits generated on demand from the bundled YAML catalogs.
- Migrate to XcodeGen (project.yml), iOS 26 / watchOS 26; CloudDocuments
  entitlement (drop CloudKit/App Group/aps-environment).
- Duration stored as Int seconds (was a Date epoch hack); fix workout
  end-on-create, undismissable delete dialog, toolbar-hiding nav stacks,
  and the Settings placeholder.
- Add README/CHANGELOG/LICENSE, .gitignore, refreshed REQUIREMENTS, and the
  Scripts/ TestFlight pipeline (release.sh + ASC API scripts).

MARKETING_VERSION 2.0.

Workouts/Views/WorkoutLogs/NotesEditView.swift

@@ -6,13 +6,14 @@
 //
 
 import SwiftUI
-import CoreData
+import SwiftData
 
 struct NotesEditView: View {
-    @Environment(\.managedObjectContext) private var viewContext
+    @Environment(SyncEngine.self) private var sync
     @Environment(\.dismiss) private var dismiss
 
-    @ObservedObject var workoutLog: WorkoutLog
+    let workout: Workout
+    let logID: String
 
     @State private var notesText: String = ""
 
@@ -40,14 +41,18 @@ struct NotesEditView: View {
                 }
             }
             .onAppear {
-                notesText = workoutLog.notes ?? ""
+                notesText = WorkoutDocument(from: workout)
+                    .logs.first(where: { $0.id == logID })?.notes ?? ""
             }
         }
     }
 
     private func saveChanges() {
-        workoutLog.notes = notesText
-        try? viewContext.save()
-        WatchConnectivityManager.shared.syncAllData()
+        var doc = WorkoutDocument(from: workout)
+        guard let i = doc.logs.firstIndex(where: { $0.id == logID }) else { return }
+        doc.logs[i].notes = notesText
+        doc.updatedAt = Date()
+        let snapshot = doc
+        Task { await sync.save(workout: snapshot) }
     }
 }