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

org/core-context.org

@@ -95,8 +95,8 @@ Reads the raw literate source of a specific skill for inspection. Used when the
   "Reads the raw literate source of a specific skill for inspection."
   (let* ((filename (format nil "~a.org" skill-name))
          (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/" data-dir))
-         (full-path (merge-pathnames filename skills-dir)))
+         (org-dir (merge-pathnames "org/" data-dir))
+         (full-path (merge-pathnames filename org-dir)))
     (if (uiop:file-exists-p full-path) (uiop:read-file-string full-path) nil)))
 #+end_src