fix(backend): make API types internal

backend/src/Socialize.Api/Modules/Clients/Handlers/GetClients.cs

@@ -6,9 +6,9 @@ using Socialize.Api.Modules.Clients.Data;
 
 namespace Socialize.Api.Modules.Clients.Handlers;
 
-public record GetClientsRequest(Guid? WorkspaceId);
+internal record GetClientsRequest(Guid? WorkspaceId);
 
-public record ClientDto(
+internal record ClientDto(
     Guid Id,
     Guid WorkspaceId,
     string Name,
@@ -18,7 +18,7 @@ public record ClientDto(
     string? PrimaryContactEmail,
     string? PrimaryContactPortraitUrl);
 
-public class GetClientsHandler(
+internal class GetClientsHandler(
     AppDbContext dbContext,
     AccessScopeService accessScopeService)
     : Endpoint<GetClientsRequest, IReadOnlyCollection<ClientDto>>