Add path execution telemetry and scenario runner

MinecraftClient.Tests/Pathing/Execution/PathTimingContractTests.cs

@@ -0,0 +1,19 @@
+using Xunit;
+
+namespace MinecraftClient.Tests.Pathing.Execution;
+
+public sealed class PathTimingContractTests
+{
+    [Fact]
+    public void Run_ManagerAcceptedAscendChain_CapturesPerSegmentTicks_AndZeroReplan()
+    {
+        PathingExecutionScenario scenario = PathingExecutionScenarioCatalog.Get("manager-accepted-ascend-chain");
+
+        PathingScenarioResult result = PathingScenarioRunner.RunAccepted(scenario);
+
+        Assert.Equal(0, result.ReplanCount);
+        Assert.True(result.Completed);
+        Assert.Equal(6, result.SegmentRuns.Count);
+        Assert.All(result.SegmentRuns, run => Assert.True(run.ElapsedTicks > 0));
+    }
+}