Add project files.

Management/Program.cs

@@ -0,0 +1,61 @@
+using Management.Data;
+using Management.Security;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Container-friendly HTTP binding
+var port = Environment.GetEnvironmentVariable("PORT") ?? "8080";
+builder.WebHost.UseUrls($"http://0.0.0.0:{port}");
+
+// Services
+builder.Services.AddControllers();
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen(c =>
+{
+    c.SwaggerDoc("v1", new() { Title = "AdPlatform Management API", Version = "v1" });
+});
+
+builder.Services.AddScoped<SqlService>();
+builder.Services.AddScoped<ClientContext>();
+builder.Services.AddHttpClient();
+
+var app = builder.Build();
+
+// Middleware pipeline
+app.UseSwagger();
+app.UseSwaggerUI();
+
+// Health check (before auth)
+app.MapGet("/health", () => Results.Ok(new
+{
+    ok = true,
+    service = "Management",
+    timestamp = DateTimeOffset.UtcNow
+}));
+
+// Root endpoint
+app.MapGet("/", () => Results.Ok(new
+{
+    service = "AdPlatform Management API",
+    version = "1.0.0",
+    status = "running",
+    endpoints = new
+    {
+        onboarding = new[] { "GET /api/onboarding/status", "POST /api/onboarding/register" },
+        monitoring = new[] { "GET /api/monitoring/health", "GET /api/monitoring/stats" },
+        admin = new
+        {
+            clients = new[] { "GET/POST /api/admin/clients", "GET/PUT/DELETE /api/admin/clients/{id}" },
+            users = new[] { "GET/POST /api/admin/users", "GET/PUT/DELETE /api/admin/users/{id}" },
+            sessions = new[] { "GET /api/admin/sessions", "POST /api/admin/sessions/{id}/revoke" }
+        }
+    }
+}));
+
+// Authentication middleware
+app.UseMiddleware<ClientAuthMiddleware>();
+
+app.UseAuthorization();
+app.MapControllers();
+
+app.Run();