Smoke-test /health for the reachable (200) and unreachable (503) cases

Elternbeirat.PocketBase/PocketBaseClient.cs

@@ -108,6 +108,43 @@ public sealed class PocketBaseClient(HttpClient httpClient)
     public Task<IReadOnlyList<FaqTopic>> GetFaqTopicsAsync(CancellationToken token = default)
         => GetRecordsAsync<FaqTopic>("faq_topics", "order", token, expand: "faqs_via_topic");
 
+    /// <summary>
+    ///     Checks whether PocketBase answers its health endpoint.
+    /// </summary>
+    /// <remarks>
+    ///     Backs the app's own <c>/health</c> endpoint, which an external monitor (Uptime
+    ///     Kuma) polls: the app answering at all proves the app is up, and this probe adds
+    ///     whether the content source behind it is reachable, so one monitor covers both.
+    ///     This calls <c>GET /api/health</c>, PocketBase's own liveness endpoint, which
+    ///     needs no auth and touches no collection.
+    /// </remarks>
+    /// <param name="token">
+    ///     A token to cancel the probe.
+    /// </param>
+    /// <returns>
+    ///     <see langword="true"/> if PocketBase answered with a success status within the
+    ///     client timeout; <see langword="false"/> if it was unreachable, timed out, or
+    ///     answered with an error status.
+    /// </returns>
+    public async Task<bool> IsHealthyAsync(CancellationToken token = default)
+    {
+        try
+        {
+            using var response = await httpClient.GetAsync(
+                new Uri("/api/health", UriKind.Relative), token);
+            return response.IsSuccessStatusCode;
+        }
+        // Same failure shapes as a record read: unreachable (HttpRequestException) or the
+        // client's own timeout (a TaskCanceledException wrapping a TimeoutException). A
+        // plain TaskCanceledException is the caller's cancellation and propagates.
+        catch (Exception exception) when (
+            exception is HttpRequestException
+                or TaskCanceledException { InnerException: TimeoutException })
+        {
+            return false;
+        }
+    }
+
     /// <summary>
     ///     Gets all public records of a collection in a single request.
     /// </summary>