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.API/Institutions/GetAvailable/Response.cs

@@ -33,7 +33,7 @@ internal sealed record AvailableAccountDto
   }
 
   public static AvailableAccountDto From(
-    PlaidMetadata plaidMetadata,
+    PlaidInstitutionMetadata plaidMetadata,
     Going.Plaid.Entity.Account plaidAccount
   )
   {