Add minor test javadocs

Author: cowtowncoder

src/test/java/tools/jackson/failing/ExternalTypeIdDup1410Test.java

@@ -10,6 +10,7 @@
 
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
+// 04-Sep-2024, tatu: Appears to pass on 3.0?
 public class ExternalTypeIdDup1410Test extends DatabindTestUtil
 {
     enum EnvironmentEventSource { BACKEND; }

src/test/java/tools/jackson/failing/JsonIgnoreProperties2803Test.java

@@ -10,6 +10,7 @@
 
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
+// 04-Sep-2024, tatu: Passes on 3.0 somehow; fails on 2.18
 class JsonIgnoreProperties2803Test extends DatabindTestUtil {
     // [databind#2803]
     static class Building2803 {