perf(tests): isolate network E2E and await QUIC cleanup

backend/tests/MoShiro.Backend.Tests/ReleaseFeedTests.cs

@@ -149,7 +149,7 @@ public sealed class ReleaseFeedTests : IAsyncLifetime
         await panel.StartAsync();
         try
         {
-            using var http = new HttpClient { BaseAddress = new Uri(panel.Services.GetRequiredService<IServer>().Features.Get<IServerAddressesFeature>()!.Addresses.First()) };
+            using var http = new HttpClient { BaseAddress = new Uri(panel.Services.GetRequiredService<IServer>().Features.Get<IServerAddressesFeature>()!.Addresses.First()), Timeout = TimeSpan.FromSeconds(15) };
             using HttpResponseMessage setup = await http.PostAsync("/api/admin/auth/setup", BackendFixture.Json(new JsonObject { ["claim_code"] = "FEED-TEST-CODE", ["username"] = "owner", ["password"] = "correct horse battery", ["return_session"] = true }));
             Assert.Equal(HttpStatusCode.Created, setup.StatusCode);
             http.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", JsonNode.Parse(await setup.Content.ReadAsStringAsync())!["session_token"]!.GetValue<string>());