feat: UUIDv4 IDs, GTD conventions, backdate ROADMAP

- memory-id-generate now produces UUIDv4 (id-87917806-...)

- GTD Conventions added to programming-standards.org

- ROADMAP.org v0.3.0 tasks have :ID:, :CREATED:, :LOGBOOK:, CLOSED:

org/core-memory.org

@@ -85,8 +85,8 @@ Generates a unique identifier string for a new Org node. Uses the universal time
 
 #+begin_src lisp
 (defun memory-id-generate ()
-  "Generates a timestamp-based unique ID."
-  (format nil "id-~36r" (get-universal-time)))
+  "Generates a UUIDv4 unique ID. Compatible with Agora Note UUIDs."
+  (concatenate 'string "id-" (string-downcase (format nil "~a" (uuid:make-v4-uuid)))))
 #+end_src
 
 ** The Data Structure (memory-object)