Merge REL1_7_STABLE into feature/REL1_7_STABLE/model

The merged work includes PR #533, which does away with the old Ptr2Long
union in favor of new PointerGetJLong and JlongGet(... conversions.
In merging, also convert the uses of Ptr2Long that were added on this
branch.

Author: jcflack

pljava-api/src/main/java/org/postgresql/pljava/annotation/processing/Commentable.java

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2016-2025 Tada AB and other contributors, as listed below.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the The BSD 3-Clause License
+ * which accompanies this distribution, and is available at
+ * http://opensource.org/licenses/BSD-3-Clause
+ *
+ * Contributors:
+ *   Purdue University
+ *   Chapman Flack
+ */
+package org.postgresql.pljava.annotation.processing;
+
+import javax.lang.model.element.Element;
+
+interface Commentable
+{
+	public String comment();
+	public void setComment( Object o, boolean explicit, Element e);
+	public String derivedComment( Element e);
+}