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/security-vault.lisp

@@ -20,6 +20,14 @@
   (let ((key (format nil "~a-~a" provider type)))
     (setf (gethash key *vault-memory*) secret)))
 
+(defun vault-get-secret (provider)
+  "Retrieves a stored secret or token for a gateway provider."
+  (vault-get provider :type :secret))
+
+(defun vault-set-secret (provider secret)
+  "Stores a secret or token for a gateway provider."
+  (vault-set provider secret :type :secret))
+
 (defskill :passepartout-security-vault
   :priority 600
   :trigger (lambda (ctx) (declare (ignore ctx)) nil))