Refactor annotation tool from WPF desktop app to .NET API

Replace the WPF desktop application (Azaion.Suite, Azaion.Annotator,
Azaion.Common, Azaion.Inference, Azaion.Loader, Azaion.LoaderUI,
Azaion.Dataset, Azaion.Test) with a standalone .NET Web API in src/.

Made-with: Cursor

src/Program.cs

@@ -0,0 +1,85 @@
+using LinqToDB;
+using LinqToDB.Data;
+using Azaion.Annotations.Auth;
+using Azaion.Annotations.Database;
+using Azaion.Annotations.Middleware;
+using Azaion.Annotations.Services;
+
+var builder = WebApplication.CreateBuilder(args);
+
+var databaseUrl = builder.Configuration["DATABASE_URL"]
+    ?? Environment.GetEnvironmentVariable("DATABASE_URL")
+    ?? "Host=localhost;Database=azaion;Username=postgres;Password=changeme";
+
+var connectionString = databaseUrl.StartsWith("postgresql://")
+    ? ConvertPostgresUrl(databaseUrl)
+    : databaseUrl;
+
+var jwtSecret = builder.Configuration["JWT_SECRET"]
+    ?? Environment.GetEnvironmentVariable("JWT_SECRET")
+    ?? "development-secret-key-min-32-chars!!";
+
+builder.Services.AddScoped(_ =>
+{
+    var options = new DataOptions()
+        .UsePostgreSQL(connectionString);
+    return new AppDataConnection(options);
+});
+
+builder.Services.AddScoped<AnnotationService>();
+builder.Services.AddScoped<MediaService>();
+builder.Services.AddScoped<DatasetService>();
+builder.Services.AddScoped<SettingsService>();
+builder.Services.AddScoped<PathResolver>();
+builder.Services.AddSingleton<AnnotationEventService>();
+builder.Services.AddSingleton(new TokenService(jwtSecret));
+
+var rabbitMqConfig = new RabbitMqConfig
+{
+    Host = Environment.GetEnvironmentVariable("RABBITMQ_HOST") ?? "127.0.0.1",
+    Port = int.TryParse(Environment.GetEnvironmentVariable("RABBITMQ_STREAM_PORT"), out var rmqPort) ? rmqPort : 5552,
+    Username = Environment.GetEnvironmentVariable("RABBITMQ_PRODUCER_USER") ?? "azaion_producer",
+    Password = Environment.GetEnvironmentVariable("RABBITMQ_PRODUCER_PASS") ?? "producer_pass",
+    StreamName = Environment.GetEnvironmentVariable("RABBITMQ_STREAM_NAME") ?? "azaion-annotations"
+};
+builder.Services.AddSingleton(rabbitMqConfig);
+builder.Services.AddHostedService<FailsafeProducer>();
+
+builder.Services.AddJwtAuth(jwtSecret);
+builder.Services.AddCors(options =>
+    options.AddDefaultPolicy(policy =>
+        policy.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader()));
+
+builder.Services.AddControllers();
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+var app = builder.Build();
+
+using (var scope = app.Services.CreateScope())
+{
+    var db = scope.ServiceProvider.GetRequiredService<AppDataConnection>();
+    DatabaseMigrator.Migrate(db);
+}
+
+app.UseMiddleware<ErrorHandlingMiddleware>();
+app.UseCors();
+app.UseAuthentication();
+app.UseAuthorization();
+app.UseSwagger();
+app.UseSwaggerUI();
+
+app.MapControllers();
+app.MapGet("/health", () => Results.Ok(new { status = "healthy" }));
+
+app.Run();
+
+static string ConvertPostgresUrl(string url)
+{
+    var uri = new Uri(url);
+    var userInfo = uri.UserInfo.Split(':');
+    var host = uri.Host;
+    var port = uri.Port > 0 ? uri.Port : 5432;
+    var database = uri.AbsolutePath.TrimStart('/');
+    return $"Host={host};Port={port};Database={database};Username={userInfo[0]};Password={userInfo.ElementAtOrDefault(1) ?? ""}";
+}