stabilizaiton work - projects rework for maintenanceability and ui livening

src/__Libraries/StellaOps.Provcache/WriteBehindQueue.Metrics.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Threading;
+
+namespace StellaOps.Provcache;
+
+public sealed partial class WriteBehindQueue
+{
+    /// <inheritdoc />
+    public WriteBehindMetrics GetMetrics()
+    {
+        return new WriteBehindMetrics
+        {
+            TotalEnqueued = Interlocked.Read(ref _totalEnqueued),
+            TotalPersisted = Interlocked.Read(ref _totalPersisted),
+            TotalFailed = Interlocked.Read(ref _totalFailed),
+            TotalRetries = Interlocked.Read(ref _totalRetries),
+            TotalBatches = Interlocked.Read(ref _totalBatches),
+            CurrentQueueDepth = Interlocked.Read(ref _currentQueueDepth),
+            Timestamp = _timeProvider.GetUtcNow()
+        };
+    }
+}