feat: add Plaid transaction handling and async queue processing

- introduced new migration to add Cursor column to AccountMetadata.
- updated AppDbContext model snapshot to reflect changes in the database schema.
- implemented async queue processing with ChannelAsyncQueue and AsyncQueueHostedService.
- created Plaid transaction handlers for added, modified, and removed transactions.
- developed PlaidTransactionService and PlaidTransactionSyncer for syncing transactions.
- added SyncUpdatesProcessor to handle sync updates from Plaid.
- updated tests to accommodate changes in institution and account metadata handling.

src/FiscalOS.Infra/Queuing/ChannelAsyncQueue.cs

@@ -0,0 +1,31 @@
+namespace FiscalOS.Infra.Queuing;
+
+internal class ChannelAsyncQueue<T> : IAsyncQueue<T>
+{
+  private readonly Channel<T> _channel = Channel.CreateUnbounded<T>();
+
+  private ChannelAsyncQueue()
+  {
+  }
+
+  public static ChannelAsyncQueue<T> From(IServiceProvider serviceProvider)
+  {
+    return new();
+  }
+
+  public async Task EnqueueAsync(T item, CancellationToken cancellationToken = default)
+  {
+    await _channel.Writer.WriteAsync(item, cancellationToken).ConfigureAwait(false);
+  }
+
+  public async Task<T> DequeueAsync(CancellationToken cancellationToken = default)
+  {
+    return await _channel.Reader.ReadAsync(cancellationToken).ConfigureAwait(false);
+  }
+
+  public async ValueTask DisposeAsync()
+  {
+    _channel.Writer.Complete();
+    await _channel.Reader.Completion.ConfigureAwait(false);
+  }
+}