fix: drop unique constraint on cloud_id

mobile/lib/infrastructure/entities/remote_asset_cloud_id.entity.dart

@@ -5,7 +5,7 @@ import 'package:immich_mobile/infrastructure/utils/drift_default.mixin.dart';
 class RemoteAssetCloudIdEntity extends Table with DriftDefaultsMixin {
   TextColumn get assetId => text().references(RemoteAssetEntity, #id, onDelete: KeyAction.cascade)();
 
-  TextColumn get cloudId => text().unique().nullable()();
+  TextColumn get cloudId => text().nullable()();
 
   DateTimeColumn get createdAt => dateTime().nullable()();
 

mobile/lib/infrastructure/entities/remote_asset_cloud_id.entity.drift.dart

@@ -438,7 +438,6 @@ class $RemoteAssetCloudIdEntityTable extends i2.RemoteAssetCloudIdEntity
     true,
     type: i0.DriftSqlType.string,
     requiredDuringInsert: false,
-    defaultConstraints: i0.GeneratedColumn.constraintIsAlways('UNIQUE'),
   );
   static const i0.VerificationMeta _createdAtMeta = const i0.VerificationMeta(
     'createdAt',

mobile/lib/infrastructure/repositories/db.repository.steps.dart

@@ -6903,7 +6903,6 @@ i1.GeneratedColumn<String> _column_99(String aliasedName) =>
       aliasedName,
       true,
       type: i1.DriftSqlType.string,
-      defaultConstraints: i1.GeneratedColumn.constraintIsAlways('UNIQUE'),
     );
 i1.GeneratedColumn<DateTime> _column_100(String aliasedName) =>
     i1.GeneratedColumn<DateTime>(

mobile/test/drift/main/generated/schema_v16.dart

@@ -5391,7 +5391,6 @@ class RemoteAssetCloudIdEntity extends Table
     true,
     type: DriftSqlType.string,
     requiredDuringInsert: false,
-    defaultConstraints: GeneratedColumn.constraintIsAlways('UNIQUE'),
   );
   late final GeneratedColumn<DateTime> createdAt = GeneratedColumn<DateTime>(
     'created_at',