stabilizaiton work - projects rework for maintenanceability and ui livening

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

@@ -0,0 +1,27 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace StellaOps.Provcache;
+
+public sealed partial class WriteBehindQueue
+{
+    /// <inheritdoc />
+    public ValueTask EnqueueAsync(ProvcacheEntry entry, CancellationToken cancellationToken = default)
+    {
+        ArgumentNullException.ThrowIfNull(entry);
+
+        var item = new WriteBehindItem
+        {
+            Entry = entry,
+            EnqueuedAt = _timeProvider.GetUtcNow(),
+            RetryCount = 0
+        };
+
+        Interlocked.Increment(ref _totalEnqueued);
+        Interlocked.Increment(ref _currentQueueDepth);
+        ProvcacheTelemetry.SetWriteBehindQueueSize((int)Interlocked.Read(ref _currentQueueDepth));
+
+        return _channel.Writer.WriteAsync(item, cancellationToken);
+    }
+}