remediation: backfill v0.1.0/v0.2.0 gaps (P0+P1)

- vault: add vault-get-secret/vault-set-secret wrappers
- programming-org: implement org-modify (text search-replace) and org-ast-render (AST to Org text)
- programming-literate: implement literate-block-balance-check (paren validation) and literate-tangle-sync-check (org→lisp diff)
- system-self-improve: replace stubs with surgical text editing and error diagnosis; remove dead first defskill
- system-event-orchestrator: implement orchestrator-bootstrap (scan Org files for HOOK/CRON)
- system-archivist: implement Scribe distillation (daily logs→atomic notes) and Gardener link/orphan repair
- system-memory: implement memory-inspect with type/todo/orphan statistics
- core-skills, core-context: fix path relic (skills/ → lisp/, org/)
- docs: add Token Economics section to DESIGN_DECISIONS, remediation roadmap entries

lisp/core-skills.lisp

@@ -271,9 +271,9 @@
         (setf (skill-entry-status entry) :failed) nil))))
 
 (defun skill-initialize-all ()
-  "Initializes all skills from the XDG skills directory."
+  "Initializes all skills from the XDG data directory."
   (let* ((data-dir (uiop:ensure-directory-pathname (or (uiop:getenv "PASSEPARTOUT_DATA_DIR") (namestring (merge-pathnames ".local/share/passepartout/" (user-homedir-pathname))))))
-         (skills-dir (merge-pathnames "skills/" (uiop:ensure-directory-pathname data-dir))))
+         (skills-dir (merge-pathnames "lisp/" (uiop:ensure-directory-pathname data-dir))))
     (unless (uiop:directory-exists-p skills-dir) (return-from skill-initialize-all nil))
     (let ((sorted-files (skill-topological-sort skills-dir)))
       (log-message "LOADER: Initializing ~a skills..." (length sorted-files))