stabilizaiton work - projects rework for maintenanceability and ui livening

src/__Libraries/StellaOps.Provcache/ProvcacheTelemetry.Histograms.cs

@@ -0,0 +1,16 @@
+using System.Diagnostics.Metrics;
+
+namespace StellaOps.Provcache;
+
+public static partial class ProvcacheTelemetry
+{
+    private static readonly Histogram<double> _latencyHistogram = Meter.CreateHistogram<double>(
+        LatencySecondsMetric,
+        unit: "s",
+        description: "Cache operation latency in seconds.");
+
+    private static readonly Histogram<long> _entrySizeHistogram = Meter.CreateHistogram<long>(
+        EntriesSizeMetric,
+        unit: "bytes",
+        description: "Size of cache entries in bytes.");
+}