fix: Re-enable Instant fields in ToDo (fixes #1854)

Author: vorburger

java/dev/enola/todo/ToDo.java

@@ -20,6 +20,7 @@
 import dev.enola.data.id.UUID_IRI;
 
 import java.net.URI;
+import java.time.Instant;
 import java.util.List;
 import java.util.Map;
 
@@ -35,10 +36,9 @@ public class ToDo {
     public final List<String> tags = new java.util.ArrayList<>();
     public final Map<String, String> attributes = new java.util.HashMap<>();
 
-    // TODO https://github.com/enola-dev/enola/issues/1854
-    // public Instant created;
-    // public Instant modified;
-    // public Instant completed;
+    public Instant created;
+    public Instant modified;
+    public Instant completed;
     public Boolean isCompleted;
 
     // status is intentionally omitted, because different backends will have differences.
@@ -60,7 +60,6 @@ public void prepareForSave() {
         if (title == null) throw new IllegalStateException("Task title is required: " + this);
         if (id == null) id = new UUID_IRI().toURI();
 
-        /* TODO Re-enable after https://github.com/enola-dev/enola/issues/1854
         if (created == null) created = Instant.now();
         else modified = Instant.now();
         if (isCompleted != null) {
@@ -70,6 +69,5 @@ public void prepareForSave() {
                 completed = null;
             }
         }
-        */
     }
 }