default empty runtimeStatus to all terminal statuses

Author: bachuv

exporthistory/src/main/java/com/microsoft/durabletask/exporthistory/models/ExportJobCreationOptions.java

@@ -27,6 +27,11 @@ public final class ExportJobCreationOptions {
                     OrchestrationRuntimeStatus.COMPLETED,
                     OrchestrationRuntimeStatus.FAILED,
                     OrchestrationRuntimeStatus.TERMINATED)));
+    private static final List<OrchestrationRuntimeStatus> ALL_TERMINAL_STATUSES = Collections.unmodifiableList(
+            Arrays.asList(
+                    OrchestrationRuntimeStatus.COMPLETED,
+                    OrchestrationRuntimeStatus.FAILED,
+                    OrchestrationRuntimeStatus.TERMINATED));
 
     private String jobId;
     private ExportMode mode;
@@ -86,7 +91,7 @@ public ExportJobCreationOptions(
                     "maxInstancesPerBatch must be between " + MIN_INSTANCES_PER_BATCH +
                     " and " + MAX_INSTANCES_PER_BATCH + ".");
         }
-        if (runtimeStatus != null) {
+        if (runtimeStatus != null && !runtimeStatus.isEmpty()) {
             for (OrchestrationRuntimeStatus status : runtimeStatus) {
                 if (!TERMINAL_STATUSES.contains(status)) {
                     throw new IllegalArgumentException(
@@ -101,7 +106,11 @@ public ExportJobCreationOptions(
         this.completedTimeTo = completedTimeTo;
         this.destination = destination;
         this.format = format != null ? format : ExportFormat.DEFAULT;
-        this.runtimeStatus = runtimeStatus;
+        // Null or empty means "no explicit filter" — default to all terminal statuses so the
+        // sidecar request is always unambiguous (matches .NET behavior).
+        this.runtimeStatus = (runtimeStatus != null && !runtimeStatus.isEmpty())
+                ? runtimeStatus
+                : ALL_TERMINAL_STATUSES;
         this.maxInstancesPerBatch = maxInstancesPerBatch;
     }