Consume PocketBase for posts and events, with English routes

Elternbeirat.Web.Tests/PocketBaseClientTests.cs

@@ -7,7 +7,8 @@ namespace Elternbeirat.Web.Tests;
 /// with a known seed (see <see cref="PocketBaseFixture"/>). Because the data is fixed,
 /// the tests assert on exact values, and they need no network to the live instance.
 /// </summary>
-public sealed class PocketBaseClientTests(PocketBaseFixture pocketBase) : IClassFixture<PocketBaseFixture>
+[Collection(PocketBaseTestGroup.Name)]
+public sealed class PocketBaseClientTests(PocketBaseFixture pocketBase)
 {
     [Fact]
     public async Task Events_load_sorted_by_start()