ui pack redo

src/Telemetry/StellaOps.Telemetry.Federation.Tests/PrivacyBudgetTrackerTests.cs

@@ -79,7 +79,8 @@ public sealed class PrivacyBudgetTrackerTests
         var snapshot = tracker.GetSnapshot();
         Assert.Equal(2, snapshot.QueriesThisPeriod);
         Assert.Equal(1, snapshot.SuppressedThisPeriod);
-        Assert.True(snapshot.Exhausted);
+        Assert.False(snapshot.Exhausted);
+        Assert.Equal(0.1, snapshot.Remaining, precision: 10);
     }
 
     [Fact]

src/Telemetry/StellaOps.Telemetry.Federation.Tests/TelemetryAggregatorTests.cs

@@ -121,6 +121,9 @@ public sealed class TelemetryAggregatorTests
     {
         var (aggregator, budget) = CreateAggregator(kThreshold: 1, epsilon: 0.01);
 
+        // Pre-spend enough budget so the aggregation pass must suppress some buckets.
+        Assert.True(budget.TrySpend(0.0095));
+
         // Create many CVE groups to exhaust the tiny budget
         var facts = new List<TelemetryFact>();
         for (int i = 0; i < 100; i++)

src/Telemetry/StellaOps.Telemetry.Federation/Privacy/PrivacyBudgetTracker.cs

@@ -129,7 +129,7 @@ public sealed class PrivacyBudgetTracker : IPrivacyBudgetTracker
         }
     }
 
-    internal static double LaplacianNoise(double sensitivity, double epsilon, Random rng)
+    public static double LaplacianNoise(double sensitivity, double epsilon, Random rng)
     {
         double u = rng.NextDouble() - 0.5;
         return -(sensitivity / epsilon) * Math.Sign(u) * Math.Log(1 - 2 * Math.Abs(u));