Fix avvio API con scope corretto servizi DB

Lux.API/Program.cs

@@ -155,18 +155,12 @@ builder.Services.AddDbContext<DataLayerContext>(options =>
         .LogTo(_ => { }); // disabilita EF logging;
 });
 
-//builder.Services.AddSingleton<DataLayerServices>();
-builder.Services.AddSingleton<DataLayerServices>();
-// altri servizi!
-builder.Services.AddSingleton<ImageCacheService>();
-builder.Services.AddSingleton<ExternalMessageProcessor>();
-builder.Services.AddHostedService<RedisSubscriberService>();
-builder.Services.AddSingleton<ConfigDataService>();
-builder.Services.AddSingleton<ProdService>();
+// servizi Scoped (usano DB)
 
+//builder.Services.AddSingleton<DataLayerServices>();
+builder.Services.AddScoped<DataLayerServices>();
 // Repository con interfaccia
 builder.Services.AddScoped<IGenClassRepository, GenClassRepository>();
-
 // Servizi dati con interfaccia
 builder.Services.AddScoped<IGenClassService, GenClassService>();
 
@@ -188,6 +182,17 @@ builder.Services.Scan(scan => scan
 ); 
 #endif
 
+// servizi Singleton (no DB)
+builder.Services.AddSingleton<ImageCacheService>();
+builder.Services.AddSingleton<ConfigDataService>();
+builder.Services.AddSingleton<ProdService>();
+
+// servizi con dipendenze" ma Scoped
+builder.Services.AddScoped<ExternalMessageProcessor>();
+
+// servizi hosted usano scope factory
+builder.Services.AddHostedService<RedisSubscriberService>();
+
 // init servizio gestone ReqIndex
 string cleanupDayTTL = configuration.GetValue<string>("ServerConf:CleanupDayTTL") ?? "360";
 string rBaseKey = configuration.GetValue<string>("ServerConf:RedisBaseKey") ?? "Lux";