Add IndieAbout + IndieBackup, TestFlight release pipeline

IndieAbout: About section in iOS Settings and macOS About window; LICENSE
switched to the portfolio-standard ISC text (reflowed for in-app rendering).

IndieBackup: files-only backup/restore of the iCloud container documents
('.notesbackup' document type on both platforms), SwiftData cache rebuilt
via SyncEngine.rebuildCache() after restore, monitors suspended during the
file swap, onOpenURL import with pre-launch queueing.

Release pipeline: Scripts/release.sh (ios|mac|all) archives and uploads via
xcodebuild + ASC API key; platform-partitioned build numbers (iOS even,
macOS odd) since both targets share one bundle ID and build sequence.

Notes/Storage/SyncEngine.swift

@@ -398,6 +398,21 @@ final class SyncEngine {
             .sorted()
     }
 
+    // MARK: - Restore support
+
+    /// Stops the metadata observers so a backup restore's bulk file
+    /// replacement isn't observed as live sync events.
+    func suspendForRestore() {
+        stopMonitoring()
+    }
+
+    /// Restarts fresh observers after a restore. The new NSMetadataQuery
+    /// re-baselines its known files on gather, so the restored tree does not
+    /// replay as a flood of add/remove events.
+    func resumeAfterRestore() {
+        startMonitoring()
+    }
+
     // MARK: - Maintenance
 
     private func performLaunchMaintenance() {