fix: cache

Program.cs

@@ -20,6 +20,7 @@ using Serilog.Events;
 using Serilog.Sinks.SystemConsole.Themes;
 using Microsoft.AspNetCore.Mvc.Razor;
 using Microsoft.AspNetCore.HttpOverrides;
+using Microsoft.AspNetCore.DataProtection;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -81,30 +82,14 @@ else
     builder.Services.AddScoped<MongoDbContext>();
 }
 
-// Cache Configuration - use Redis if available, otherwise memory cache
-var redisConnectionString = builder.Configuration.GetConnectionString("Redis");
-if (!string.IsNullOrEmpty(redisConnectionString))
-{
-    try
-    {
-        builder.Services.AddStackExchangeRedisCache(options =>
-        {
-            options.Configuration = redisConnectionString;
-        });
-    }
-    catch
-    {
-        // Fallback to memory cache if Redis fails
-        builder.Services.AddMemoryCache();
-        builder.Services.AddSingleton<IDistributedCache, QRRapidoApp.Services.MemoryDistributedCacheWrapper>();
-    }
-}
-else
-{
-    // Use memory cache when Redis is not configured
-    builder.Services.AddMemoryCache();
-    builder.Services.AddSingleton<IDistributedCache, MemoryDistributedCacheWrapper>();
-}
+builder.Services.AddMemoryCache();
+builder.Services.AddSingleton<IDistributedCache, MemoryDistributedCacheWrapper>();
+
+// ✅ DataProtection compartilhado via FileSystem (ADICIONAR APÓS O CACHE)
+builder.Services.AddDataProtection()
+    .PersistKeysToFileSystem(new DirectoryInfo("/app/keys"))
+    .SetApplicationName("QRRapido");
+
 
 // Authentication Configuration
 builder.Services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)