feat(backend): add admin evaluation history, engine, simulation, bot API controllers and global exception middleware

FinlyticBackend/Database/BackendDbContext.cs

@@ -1,9 +1,16 @@
 using FinlyticBackend.Entities;
+using FinlyticCore.Database;
+using FinlyticCore.Entities.Settings;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
 
 namespace FinlyticBackend.Database;
 
-public class BackendDbContext : DbContext
+/// <summary>
+/// FinlyticBackend previously implemented no <see cref="ISettingsDbContext"/> at all, unlike every other
+/// service - which is why it never had dynamic settings (logging channels etc.) to show in the admin UI.
+/// </summary>
+public class BackendDbContext : DbContext, ISettingsDbContext
 {
     public BackendDbContext(DbContextOptions<BackendDbContext> options) : base(options) { }
 
@@ -11,11 +18,18 @@ public class BackendDbContext : DbContext
     public DbSet<UserDeviceTokenEntity> UserDeviceTokens => Set<UserDeviceTokenEntity>();
     public DbSet<UserFavoriteAssetEntity> UserFavoriteAssets => Set<UserFavoriteAssetEntity>();
     public DbSet<ServiceConfigurationEntity> ServiceConfigurations => Set<ServiceConfigurationEntity>();
+    public DbSet<SettingEntity> DynamicSettings => Set<SettingEntity>();
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
         base.OnModelCreating(modelBuilder);
 
+        modelBuilder.Entity<SettingEntity>(entity =>
+        {
+            entity.HasKey(e => e.Id);
+            entity.HasIndex(e => e.Key).IsUnique();
+        });
+
         modelBuilder.Entity<UserEntity>(entity =>
         {
             entity.ToTable("users");
@@ -73,3 +87,19 @@ public class BackendDbContext : DbContext
         });
     }
 }
+
+/// <summary>
+/// Lets `dotnet ef migrations add` construct a <see cref="BackendDbContext"/> without booting the full
+/// application (which fails fast at startup if JWT_SECRET_KEY/ADMIN_DEFAULT_PASSWORD aren't set - see
+/// Program.cs) - the same pattern every other service's DbContext already uses
+/// (e.g. <c>TechnicalAnalysisDbContextFactory</c>).
+/// </summary>
+public class BackendDbContextFactory : IDesignTimeDbContextFactory<BackendDbContext>
+{
+    public BackendDbContext CreateDbContext(string[] args)
+    {
+        var optionsBuilder = new DbContextOptionsBuilder<BackendDbContext>();
+        optionsBuilder.UseNpgsql("Host=localhost;Database=finlytic_backend;Username=postgres;Password=postgres");
+        return new BackendDbContext(optionsBuilder.Options);
+    }
+}