cover epoch dates in both local asset tables

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/MessagesImplBase.kt

@@ -174,8 +174,8 @@ open class NativeSyncApiImplBase(context: Context) : ImmichPlugin(), ActivityAwa
             MediaStore.Files.FileColumns.MEDIA_TYPE_VIDEO -> 2L
             else -> 0L
           }
-          // Date taken is in ms; added/modified are in seconds. No-EXIF assets use the earliest
-          // positive modified/added date, or added if neither is positive.
+          // Date taken is in ms; added/modified are in seconds, and modified can be 0 when unset.
+          // No-EXIF assets use the earliest positive added/modified date, or raw added if neither is positive.
           val modifiedAt = c.getLong(dateModifiedColumn)
           val addedAt = c.getLong(dateAddedColumn)
           val createdAt = (c.getLong(dateTakenColumn).takeIf { it > 0 }?.div(1000))

mobile/test/modules/utils/migration_test.dart

@@ -102,15 +102,32 @@ void main() {
             source: TrashOrigin.localSync,
           ),
         );
+    await db
+        .into(db.trashedLocalAssetEntity)
+        .insert(
+          TrashedLocalAssetEntityCompanion.insert(
+            id: 'trashed-epoch',
+            albumId: 'album',
+            name: 'trashed-epoch.jpg',
+            type: AssetType.image,
+            createdAt: drift.Value(createdAt),
+            updatedAt: drift.Value(epoch),
+            source: TrashOrigin.localSync,
+          ),
+        );
 
     await migrateDatabaseIfNeeded(db);
 
     final local = await (db.select(db.localAssetEntity)..where((row) => row.id.equals('local'))).getSingle();
     final unchanged = await (db.select(db.localAssetEntity)..where((row) => row.id.equals('epoch'))).getSingle();
-    final trashed = await db.select(db.trashedLocalAssetEntity).getSingle();
+    final trashed = await (db.select(db.trashedLocalAssetEntity)..where((row) => row.id.equals('trashed'))).getSingle();
+    final trashedUnchanged = await (db.select(
+      db.trashedLocalAssetEntity,
+    )..where((row) => row.id.equals('trashed-epoch'))).getSingle();
     expect(local.createdAt, updatedAt);
     expect(unchanged.createdAt, createdAt);
     expect(trashed.createdAt, updatedAt);
+    expect(trashedUnchanged.createdAt, createdAt);
     expect(await storeRepository.tryGet(StoreKey.version), 27);
   });
 }