feat(usability): preserve reporting year and locate outside-period bookings (U04)

src/Duempelkas.Infrastructure/DependencyInjection.cs

@@ -11,8 +11,8 @@ public static class DependencyInjection
     public static IServiceCollection AddInfrastructure(this IServiceCollection services, string connectionString)
     {
         services.AddSingleton(new DatabaseLocation(connectionString));
-        services.AddDbContext<FinanceDbContext>(options =>
-            options.UseSqlite(connectionString));
+        // The factory also registers FinanceDbContext as scoped. Registering
+        // AddDbContext first would give its singleton factory scoped options.
         services.AddDbContextFactory<FinanceDbContext>(options =>
             options.UseSqlite(connectionString));
 
@@ -24,6 +24,7 @@ public static class DependencyInjection
         services.AddScoped<IFileSaveService, FileSaveService>();
         services.AddSingleton<IBackupService, BackupService>();
         services.AddSingleton<ISettingsService, SettingsService>();
+        services.AddSingleton<ReportingPeriod>();
 
         return services;
     }