feat(adminui): add DriverStatusSignalRBridge + InMemory snapshot store

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Hubs/InMemoryDriverStatusSnapshotStore.cs

@@ -0,0 +1,21 @@
+using System.Collections.Concurrent;
+using ZB.MOM.WW.OtOpcUa.Commons.Messages.Drivers;
+
+namespace ZB.MOM.WW.OtOpcUa.AdminUI.Hubs;
+
+/// <summary>
+///     Thread-safe in-memory implementation of <see cref="IDriverStatusSnapshotStore"/>.
+///     Keyed by <see cref="DriverHealthChanged.DriverInstanceId"/>; last write wins.
+/// </summary>
+public sealed class InMemoryDriverStatusSnapshotStore : IDriverStatusSnapshotStore
+{
+    private readonly ConcurrentDictionary<string, DriverHealthChanged> _byInstance = new();
+
+    /// <inheritdoc />
+    public void Upsert(DriverHealthChanged snapshot)
+        => _byInstance[snapshot.DriverInstanceId] = snapshot;
+
+    /// <inheritdoc />
+    public bool TryGet(string driverInstanceId, out DriverHealthChanged snapshot)
+        => _byInstance.TryGetValue(driverInstanceId, out snapshot!);
+}