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.AdminCLI/Commands.cs

@@ -4,11 +4,13 @@ internal static class Commands
 {
   public const string CreateUser = "Create User";
   public const string GenerateKey = "Generate Key";
+  public const string RemoveInstitution = "Remove Institution";
   public const string Exit = "Exit";
 
   public static readonly string[] All = [
     CreateUser,
     GenerateKey,
+    RemoveInstitution,
     Exit
   ];
 }