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%)

.gitignore

@@ -13,3 +13,4 @@ test_input.txt
 *.fasl
 docs/#DESIGN_DECISIONS.org# docs/DESIGN_DECISIONS.org~
 extras/*.elc
+state/