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.

tests/FiscalOS.API.Tests/Integration/Institutions/ConnectTests.cs

@@ -101,7 +101,7 @@ public class ConnectTests(TestApi testApi) : IntegrationTest(testApi)
       var user = User.From("User1", passwordHasher.Hash("@Password1"), userEncryptionKey);
 
       var encryptedAccessToken = await encryptor.EncryptAsyncFor(user, "accessToken", ct);
-      var plaidMetadata = PlaidMetadata.From("alreadyExists", "Some Bank", encryptedAccessToken);
+      var plaidMetadata = PlaidInstitutionMetadata.From("alreadyExists", "Some Bank", encryptedAccessToken);
       var institution = Institution.From("Some Bank", plaidMetadata);
 
       user.AddInstitution(institution);
@@ -117,7 +117,7 @@ public class ConnectTests(TestApi testApi) : IntegrationTest(testApi)
       .WithBody(new
       {
         publicToken = "token",
-        plaidInstitutionId = ((PlaidMetadata)institution.Metadata!).PlaidId,
+        plaidInstitutionId = ((PlaidInstitutionMetadata)institution.Metadata!).PlaidId,
       })
       .Build();
 
@@ -179,7 +179,7 @@ public class ConnectTests(TestApi testApi) : IntegrationTest(testApi)
     var institution = updatedUser.Institutions.First();
     institution.Name.Should().NotBeNullOrEmpty();
 
-    var metadata = institution.Metadata.As<PlaidMetadata>();
+    var metadata = institution.Metadata.As<PlaidInstitutionMetadata>();
     metadata.PlaidId.Should().Be(plaidInstitutionId);
     metadata.PlaidName.Should().Be(institution.Name);
     metadata.EncryptedAccessToken.Should().NotBeNullOrEmpty();

tests/FiscalOS.API.Tests/Integration/Institutions/GetAvailableTests.cs

@@ -92,7 +92,7 @@ public class GetAvailableTests(TestApi testApi) : IntegrationTest(testApi)
         AccessToken = exchangeTokenResponse.AccessToken,
       });
       var encryptedAccessToken = await encryptor.EncryptAsyncFor(user, exchangeTokenResponse.AccessToken, ct);
-      var institutionMetadata = PlaidMetadata.From(institutionId, "Some Bank", encryptedAccessToken);
+      var institutionMetadata = PlaidInstitutionMetadata.From(institutionId, "Some Bank", encryptedAccessToken);
       var institution = Institution.From("Some Bank", institutionMetadata);
 
       user.AddInstitution(institution);

tests/FiscalOS.API.Tests/Integration/Institutions/GetTests.cs

@@ -45,7 +45,7 @@ public class GetTests(TestApi testApi) : IntegrationTest(testApi)
       var user = User.From("User1", passwordHasher.Hash("@Password1"), userEncryptionKey);
 
       var encryptedAccessToken = await encryptor.EncryptAsyncFor(user, "accessToken", ct);
-      var plaidMetadata = PlaidMetadata.From("alreadyExists", "Some Bank", encryptedAccessToken);
+      var plaidMetadata = PlaidInstitutionMetadata.From("alreadyExists", "Some Bank", encryptedAccessToken);
       var institution = Institution.From("Some Bank", plaidMetadata);
 
       user.AddInstitution(institution);