feat(v0.3.0): Event Orchestrator skill

- New system-event-orchestrator skill with hook registry, cron registry, and tier classifier

- Three dispatch tiers: :reflex (no LLM), :cognition (light), :reasoning (full)

- Org-mode timestamp parsing for repeat patterns (+1w, +1d, +1m)

- Registers on heartbeat via defskill, dispatches due cron jobs

- Fix all remaining harness-log → log-message references across org files

org/programming-lisp.org

@@ -104,10 +104,10 @@ The skill has four layers:
           (if (= code 0)
               out
               (progn
-                (harness-log "FORMAT ERROR: ~a" err)
+                (log-message "FORMAT ERROR: ~a" err)
                 code-string))))
     (error (c)
-      (harness-log "FORMAT EXCEPTION: ~a" c)
+      (log-message "FORMAT EXCEPTION: ~a" c)
       code-string)))
 #+end_src