refactor(mobile): device asset entity to use modified time (#17064)

* refactor: device asset entity to use modified time

* chore: cleanup

* refactor: remove album media dependency from hashservice

* refactor: return updated copy of asset

* add hash service tests

* chore: rename hash batch constants

* chore: log the number of assets processed during migration

* chore: more logs

* refactor: use lookup and more tests

* use sort approach

* refactor hash service to use for loop instead

* refactor: rename to getByIds

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/domain/models/device_asset.model.dart

@@ -0,0 +1,44 @@
+import 'dart:typed_data';
+
+class DeviceAsset {
+  final String assetId;
+  final Uint8List hash;
+  final DateTime modifiedTime;
+
+  const DeviceAsset({
+    required this.assetId,
+    required this.hash,
+    required this.modifiedTime,
+  });
+
+  @override
+  bool operator ==(covariant DeviceAsset other) {
+    if (identical(this, other)) return true;
+
+    return other.assetId == assetId &&
+        other.hash == hash &&
+        other.modifiedTime == modifiedTime;
+  }
+
+  @override
+  int get hashCode {
+    return assetId.hashCode ^ hash.hashCode ^ modifiedTime.hashCode;
+  }
+
+  @override
+  String toString() {
+    return 'DeviceAsset(assetId: $assetId, hash: $hash, modifiedTime: $modifiedTime)';
+  }
+
+  DeviceAsset copyWith({
+    String? assetId,
+    Uint8List? hash,
+    DateTime? modifiedTime,
+  }) {
+    return DeviceAsset(
+      assetId: assetId ?? this.assetId,
+      hash: hash ?? this.hash,
+      modifiedTime: modifiedTime ?? this.modifiedTime,
+    );
+  }
+}