feat: summarize published EM observation trajectories

ClumsyPilot/tests/EMPlannerVerificationHost/TrajectoryObservationChecks.cs

@@ -32,6 +32,7 @@ internal static class TrajectoryObservationChecks
         VerifiesLsAndStUsePublishedTrajectoryData();
         VerifiesPresentationTextDescribesObservationWithoutSendingCommand();
         VerifiesPlanningDiagnosticsKeepRawFailureReason();
+        VerifiesPublishedPlanningDiagnosticsIncludeTrajectorySummary();
         VerifiesEmptyChartsReceivePersistentPlanningDiagnostic();
         VerifiesLsPresentationUsesPathSOnHorizontalAxis();
         VerifiesRollingRequestUsesOnePublishedTrajectorySnapshot();
@@ -595,12 +596,34 @@ internal static class TrajectoryObservationChecks
         Verification.True(diagnostic.Text.Contains("elapsed=18ms"), "diagnostic preserves elapsed time");
         Verification.True(diagnostic.Text.Contains("reason=map=3;reference=diagnostic-reference"),
             "diagnostic preserves planner failure reason");
+        Verification.True(!diagnostic.Text.Contains("trajectory summary:"),
+            "failed diagnostic has no stale trajectory summary");
 
         TrajectoryObservationDiagnostic pending = TrajectoryObservationDiagnostics.Create(
             null, TimeSpan.Zero, true, null);
         Verification.Equal("planning status=pending", pending.Text, "diagnostic reports pending before completion");
     }
 
+    private static void VerifiesPublishedPlanningDiagnosticsIncludeTrajectorySummary()
+    {
+        DateTimeOffset effectiveAt = new DateTimeOffset(2026, 8, 5, 0, 0, 0, TimeSpan.Zero);
+        EmTrajectory trajectory = CreatePublishedTrajectory(effectiveAt);
+        var succeeded = new PlanningCycleResult(9L,
+            new PlanningCycleIdentity(1L, "summary-reference", 2L, string.Empty, 0),
+            new EmPlanningResult(EmPlanningStatus.Success, trajectory, string.Empty), true, string.Empty);
+
+        string text = TrajectoryObservationDiagnostics.Create(
+            succeeded, TimeSpan.FromMilliseconds(12d), false, trajectory).Text;
+        foreach (string expected in new[]
+        {
+            "trajectory summary:", "trajectoryId=observer-published", "points=2", "duration=1.000s",
+            "pathLength=1.000m", "maxSpeed=0.400m/s", "maxAcceleration=0.200m/s2", "maxJerk=0.000m/s3",
+        })
+        {
+            Verification.True(text.Contains(expected), "published diagnostic includes " + expected);
+        }
+    }
+
     private static void VerifiesEmptyChartsReceivePersistentPlanningDiagnostic()
     {
         string presentationPath = Path.Combine(Directory.GetCurrentDirectory(), "ClumsyPilot",