Refresh CLAUDE.md for 2.0; link changelog from the version in About

- Rewrite the stale CoreData/CloudKit architecture docs to describe the
  2.0 iCloud Drive document architecture (JSON source of truth + SwiftData
  cache, SyncEngine/ICloudFileManager/ICloudFileMonitor, ULID document/
  entity/mapper split, AppServices DI, WatchConnectivity bridge, XcodeGen/
  Swift 6/iOS 26, real directory layout).
- Add an "Authoring the Changelog" section documenting the end-user,
  one-paragraph-per-entry, derive-but-rewrite-from-git-log convention.
- About screen: make the version line open the changelog (IndieAbout
  0.2.0 changelogDocument) and drop the separate "Changelog" link; bump
  the IndieAbout dependency to from: 0.2.0.

Claude-Session: https://claude.ai/code/session_01A9CfUa4E9Zd5swfoNsYPs7

Workouts/Views/Settings/SettingsView.swift

@@ -109,9 +109,9 @@ struct SettingsView: View {
                 Section {
                     IndieAbout(configuration: AppInfoConfiguration(
                         documents: [
-                            .custom(title: "Changelog", filename: "CHANGELOG", extension: "md"),
                             .license(extension: "md")
-                        ]
+                        ],
+                        changelogDocument: .changelog()
                     ))
                 }
             }