passepartout: v0.5.1 — Compilation Hardening

Fixed 3 real compilation errors:
- security-vault.lisp: bare defvar missing opening paren
- embedding-native.lisp: CFFI struct refs updated (llama-mparams→(:struct ...), 19 places)
- symbolic-events.lisp: heartbeat vars + save-memory-to-disk → passepartout:: prefix

Suppressed ~100 harmless cross-skill STYLE-WARNINGs:
- Added grep filter for STYLE-WARNING / WARNING: redefining
  in the pre-compile step of the passepartout bash script

ROADMAP updated: all v0.5.1 items marked DONE.
Test suite: 116/116 (100%)

org/security-vault.org

@@ -107,8 +107,7 @@ Delegates to the existing =vault-get=/=vault-set= with ~:type :secret~.
 ** Vault Memory (relocated from core-skills)
 
 #+begin_src lisp
-defvar *VAULT-MEMORY* (make-hash-table :test 'equal))
-#+end_src
+(defvar *VAULT-MEMORY* (make-hash-table :test 'equal))
 #+end_src
 
 * Test Suite