feat: add remote pull and push

lib/database/app_database.dart

@@ -38,6 +38,8 @@ class BarTabs extends Table {
 
   DateTimeColumn get closedAt => dateTime().nullable()();
 
+  IntColumn get version => integer().withDefault(const Constant(0))();
+
   @override
   Set<Column> get primaryKey => {id};
 }
@@ -138,24 +140,51 @@ class AppSettingsTable extends Table {
   Set<Column> get primaryKey => {id};
 }
 
+@DataClassName('RemoteSyncStateRow')
+class RemoteSyncState extends Table {
+  TextColumn get deviceId => text()();
+
+  TextColumn get serverCursor => text().nullable()();
+
+  DateTimeColumn get lastSuccessfulSyncAt => dateTime().nullable()();
+
+  DateTimeColumn get lastAttemptedSyncAt => dateTime().nullable()();
+
+  IntColumn get consecutiveFailureCount => integer().withDefault(const Constant(0))();
+
+  @override
+  Set<Column> get primaryKey => {deviceId};
+}
+
+@DataClassName('ProcessedRemoteCommandRow')
+class ProcessedRemoteCommands extends Table {
+  TextColumn get commandId => text()();
+  TextColumn get commandType => text()();
+  DateTimeColumn get processedAt => dateTime()();
+  TextColumn get result => text()();
+
+  @override
+  Set<Column> get primaryKey => {commandId};
+}
+
 @DriftDatabase(
   tables: [
     Products,
     BarTabs,
     TabItems,
     TabItemPurchases,
-
     ClosedTabs,
     ClosedTabItems,
-
     AppSettingsTable,
+    RemoteSyncState,
+    ProcessedRemoteCommands,
   ],
 )
 class AppDatabase extends _$AppDatabase {
   AppDatabase([QueryExecutor? executor]) : super(executor ?? _openConnection());
 
   @override
-  int get schemaVersion => 11;
+  int get schemaVersion => 12;
 
   @override
   MigrationStrategy get migration {
@@ -232,6 +261,14 @@ class AppDatabase extends _$AppDatabase {
         if (from < 11) {
           await migrator.createTable(tabItemPurchases);
         }
+
+        if (from < 12) {
+          if (!await hasTableColumn('bar_tabs', 'version')) {
+            await migrator.addColumn(barTabs, barTabs.version);
+          }
+          await migrator.createTable(remoteSyncState);
+          await migrator.createTable(processedRemoteCommands);
+        }
       },
     );
   }
@@ -244,4 +281,4 @@ class AppDatabase extends _$AppDatabase {
       ),
     );
   }
-}
+}