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/system-self-improve.org

@@ -16,7 +16,7 @@ The function intentionally only logs the change — the actual file I/O is handl
 (defun self-improve-edit (filepath old-text new-text)
   "Applies a transformation to a source file."
   (declare (ignore old-text new-text))
-  (harness-log "SELF-EDIT: Applying changes to ~a" filepath))
+  (log-message "SELF-EDIT: Applying changes to ~a" filepath))
 #+end_src
 
 ** Skill Registration
@@ -39,7 +39,7 @@ When a skill file fails to compile or a runtime error occurs, Self Fix attempts
 (defun self-improve-fix (skill-name error-log)
   "Attempts to diagnose and repair a broken skill."
   (declare (ignore error-log))
-  (harness-log "SELF-FIX: Attempting repair of ~a..." skill-name))
+  (log-message "SELF-FIX: Attempting repair of ~a..." skill-name))
 #+end_src
 
 ** Skill Registration