feat(core): dynamic settings service, IFinlyticLogger, log broadcaster, and persistent Yahoo auth

FinlyticCore/Database/ISettingsDbContext.cs

@@ -0,0 +1,15 @@
+using System.Threading;
+using System.Threading.Tasks;
+using FinlyticCore.Entities.Settings;
+using Microsoft.EntityFrameworkCore;
+
+namespace FinlyticCore.Database;
+
+/// <summary>
+/// Einheitliches Interface für DbContexts, die dynamische Einstellungen verwalten.
+/// </summary>
+public interface ISettingsDbContext
+{
+    DbSet<SettingEntity> DynamicSettings { get; }
+    Task<int> SaveChangesAsync(CancellationToken cancellationToken = default);
+}