feat: add account-scoped data synchronization

node-agent/WxAgent.Host/WindowsAgentBackend.cs

@@ -4,11 +4,12 @@ using WxAgent.Windows;
 
 namespace WxAgent.Host;
 
-public sealed class WindowsAgentBackend(AccountBindingStore bindings, ServiceOptions options) : IAgentBackend, IAgentEventSource
+public sealed class WindowsAgentBackend(AccountBindingStore bindings, ServiceOptions options) : IAgentBackend, IAgentEventSource, IRemoteDataCollector
 {
     private readonly bool validationOperationsEnabled = options.EnableValidationOperations;
     private readonly bool listenerEventsEnabled = options.EnableListenerEvents;
     private readonly SemaphoreSlim bindingGate = new(1, 1);
+    private readonly DatabaseMessageSyncCollector databaseSyncCollector = new(null, options.DataSyncBatchLimit, options.DataSyncOverlapRows);
 
     public IReadOnlyList<AgentCapability> Capabilities =>
     [
@@ -439,6 +440,13 @@ public sealed class WindowsAgentBackend(AccountBindingStore bindings, ServiceOpt
         return new Page<GroupMemberInfo>(items, limit, offset, page.HasMore, page.NextOffset);
     }
 
+    public Task<RemoteDataCollection> CollectAsync(
+        string accountId,
+        IReadOnlyList<RemoteReportingScope> scopes,
+        RemoteDataSyncCheckpoint checkpoint,
+        CancellationToken cancellationToken) =>
+        databaseSyncCollector.CollectAsync(accountId, scopes, checkpoint, cancellationToken);
+
     public async Task<IReadOnlyList<DatabaseMessageInfo>> DatabaseMessagesAsync(string accountId, string chatId, int limit, long? localId, CancellationToken cancellationToken)
     {
         var account = await DatabaseKeyStore.LoadAsync(null, cancellationToken);