[BUG] Unable to Run Swagger from FastEndPoint

[fshahin90]

Description

When trying to configure Swagger a Internal Server Eror appar

Steps to Reproduce

In Program.cs add the following

• inside builder.Services.AddElsa add the following elsa.AddSwagger();
• After builder.Services.AddElsa add the following builder.Services.AddFastEndpoints().AddSwaggerDocument();
• in the app section add the following app.UseFastEndpoints().UseSwaggerGen(); and app.MapFastEndpoints();

using Elsa.Studio.Core.BlazorServer.Extensions;
using Elsa.Studio.Dashboard.Extensions;
using Elsa.Studio.Extensions;
using Elsa.Studio.Login.BlazorServer.Extensions;
using Elsa.Studio.Login.HttpMessageHandlers;
using Elsa.Studio.Shell.Extensions;
using Elsa.Studio.Workflows.Extensions;
using Elsa.Studio.Workflows.Designer.Extensions;
using Elsa.Extensions;
using FastEndpoints;
using FastEndpoints.Swagger;
using Elsa.Studio.Models;
using Elsa.EntityFrameworkCore.Modules.Management;
using Elsa.EntityFrameworkCore.Extensions;
using Elsa.EntityFrameworkCore.Modules.Runtime;
using Elsa.Alterations.Extensions;

var builder = WebApplication.CreateBuilder(args);
var configuration = builder.Configuration;

builder.Services.AddElsa(elsa =>
{

    elsa.UseWorkflowManagement(managment =>
    {
        managment.UseEntityFrameworkCore(ef =>
        {
            ef.UseSqlServer(configuration.GetConnectionString("Elsa"));
        });
    });
    elsa.UseWorkflowRuntime(runtime =>
    {
        runtime.UseEntityFrameworkCore(ef =>
        {
            ef.UseSqlServer(configuration.GetConnectionString("Elsa"));
        });
    });
    elsa.UseIdentity(identity =>
    {
        identity.TokenOptions = options => options.SigningKey = "sufficiently-large-secret-signing-key";
        identity.UseAdminUserProvider();
    });
    elsa.AddSwagger();
    elsa.UseDefaultAuthentication(auth => auth.UseAdminApiKey());
    elsa.UseWorkflowsApi();
    elsa.UseRealTimeWorkflows();
    elsa.UseCSharp();
    elsa.UseJavaScript();
    elsa.UseHttp();
    elsa.AddSwagger();
    elsa.UseExpressions();
    elsa.UseLabels();
    elsa.UseAlterations();
    elsa.AddActivitiesFrom<Program>();
    elsa.AddWorkflowsFrom<Program>();
});
builder.Services.AddFastEndpoints().AddSwaggerDocument();
builder.Services.AddCors(cors =>
{
    cors.AddDefaultPolicy(policy =>
    {
        policy.AllowAnyOrigin().AllowAnyHeader().AllowAnyMethod().WithExposedHeaders("x-elsa-workflow-instance-id");
    });
});
builder.Services.AddHealthChecks();

builder.Services.AddRazorPages();
builder.Services.AddServerSideBlazor(options =>
{
    options.DetailedErrors = true;
    options.RootComponents.RegisterCustomElsaStudioElements();
});

builder.Services.AddCore();
builder.Services.AddShell(options => configuration.GetSection("Shell").Bind(options));
var backendApiConfig = new BackendApiConfig
{
    ConfigureBackendOptions = options => configuration.GetSection("Backend").Bind(options),
    ConfigureHttpClientBuilder = options => options.AuthenticationHandler = typeof(AuthenticatingApiHttpMessageHandler),
};
builder.Services.AddRemoteBackend(backendApiConfig);
builder.Services.AddLoginModule();
builder.Services.AddDashboardModule();
builder.Services.AddWorkflowsModule();

builder.Services.AddSignalR(options =>
{
    options.MaximumReceiveMessageSize = 5 * 1024 * 1000;
});

var app = builder.Build();
app.UseCors();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseFastEndpoints().UseSwaggerGen();
app.UseWorkflowsApi();
app.UseWorkflows();
app.UseWorkflowsSignalRHubs();
app.MapBlazorHub();
app.MapFallbackToPage("/_Host");
app.MapFastEndpoints();

app.Run();

Expected Behavior

I must be able to navigate to /swagger

Actual Behavior

I get a Internal Server Error

Screenshots

Environment

• Elsa Package Version: 3.3.0-rc6 also in 3.2.3
• Operating System: Windows
• Browser and Version: MS Edge
• Net Core:9.0

Log Output

fail: Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1]
      An unhandled exception has occurred while executing the request.
      System.InvalidOperationException: Duplicate endpoint name 'ElsaWorkflowsApiEndpointsWorkflowInstancesVariablesPostList' found on 'HTTP: POST /elsa/api/workflow-instances/{id}/variables' and 'HTTP: POST /workflow-instances/{id}/variables'. Endpoint names must be globally unique.
         at Microsoft.AspNetCore.Routing.Matching.DataSourceDependentMatcher.CreateMatcher(IReadOnlyList`1 endpoints)
         at Microsoft.AspNetCore.Routing.DataSourceDependentCache`1.Initialize()
         at System.Threading.LazyInitializer.EnsureInitializedCore[T](T& target, Boolean& initialized, Object& syncLock, Func`1 valueFactory)
         at Microsoft.AspNetCore.Routing.Matching.DataSourceDependentMatcher..ctor(EndpointDataSource dataSource, Lifetime lifetime, Func`1 matcherBuilderFactory)
         at Microsoft.AspNetCore.Routing.Matching.DfaMatcherFactory.CreateMatcher(EndpointDataSource dataSource)
         at Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.InitializeCoreAsync()
      --- End of stack trace from previous location ---
         at Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.<Invoke>g__AwaitMatcher|10_0(EndpointRoutingMiddleware middleware, HttpContext httpContext, Task`1 matcherTask)
         at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)
fail: Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1]
      An unhandled exception has occurred while executing the request.
      System.InvalidOperationException: Duplicate endpoint name 'ElsaWorkflowsApiEndpointsWorkflowInstancesVariablesPostList' found on 'HTTP: POST /elsa/api/workflow-instances/{id}/variables' and 'HTTP: POST /workflow-instances/{id}/variables'. Endpoint names must be globally unique.
         at Microsoft.AspNetCore.Routing.Matching.DataSourceDependentMatcher.CreateMatcher(IReadOnlyList`1 endpoints)
         at Microsoft.AspNetCore.Routing.DataSourceDependentCache`1.Initialize()
         at System.Threading.LazyInitializer.EnsureInitializedCore[T](T& target, Boolean& initialized, Object& syncLock, Func`1 valueFactory)
         at Microsoft.AspNetCore.Routing.Matching.DataSourceDependentMatcher..ctor(EndpointDataSource dataSource, Lifetime lifetime, Func`1 matcherBuilderFactory)
         at Microsoft.AspNetCore.Routing.Matching.DfaMatcherFactory.CreateMatcher(EndpointDataSource dataSource)
         at Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.InitializeCoreAsync()
      --- End of stack trace from previous location ---
         at Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.<Invoke>g__AwaitMatcher|10_0(EndpointRoutingMiddleware middleware, HttpContext httpContext, Task`1 matcherTask)
         at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)