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%)

lisp/security-vault.lisp

@@ -34,7 +34,7 @@
   :priority 600
   :trigger (lambda (ctx) (declare (ignore ctx)) nil))
 
-defvar *VAULT-MEMORY* (make-hash-table :test 'equal))
+(defvar *VAULT-MEMORY* (make-hash-table :test 'equal))
 
 (eval-when (:compile-toplevel :load-toplevel :execute)
   (ql:quickload :fiveam :silent t))