feat: vendorizar as 10 skills do pilar de seguranca em skills/

Copia local (nao fork, nao submodule) de safedeps, sca-audit,
secrets-scan, code-review-security, api-security-review,
web-security-review, cve-triage, patch-prioritization,
dependency-scanning e hermaguard -- commit exato de origem e licenca
de cada uma em skills/NOTICE.md. Elimina o passo de clone externo
pro pilar de seguranca do wf-security-review: git clone deste repo
ja traz tudo funcional.

Corrige tambem o comando de instalacao pro Claude Code nos dois
READMEs e no docs/SKILLS.md: Claude Code exige um diretorio por
skill (skills/<nome>/SKILL.md), nao aceita os .md soltos que o
comando antigo copiava -- confirmado testando a instalacao real.

skills/hermaguard/tools/hermaguard-benchmark/bugs/007-missing-authz/code/app.py

@@ -0,0 +1,5 @@
+def delete_user(session_user, target_id: int):
+    # authn done upstream, but no role check
+    db.execute("DELETE FROM users WHERE id = ?", (target_id,))
+    db.commit()
+    return {"ok": True}

skills/hermaguard/tools/hermaguard-benchmark/bugs/007-missing-authz/ground-truth.json

@@ -0,0 +1,18 @@
+{
+  "title": "Admin endpoint without authorization check",
+  "description": "delete_user performs no permission check; any authenticated user can delete anyone.",
+  "severity": "CRITICAL",
+  "category": "security",
+  "findings": [
+    {
+      "file": "app.py",
+      "trigger": "admin action without role/permission check",
+      "description": "Privilege escalation \u2014 any user deletes any account",
+      "severity": "CRITICAL",
+      "classes": [
+        "CWE-862",
+        "CWE-269"
+      ]
+    }
+  ]
+}

skills/hermaguard/tools/hermaguard-benchmark/bugs/007-missing-authz/pre.diff

@@ -0,0 +1,6 @@
+--- a/app.py
++++ b/app.py
+ def delete_user(session_user, target_id: int):
+-    if session_user.get("role") != "admin":
+-        raise PermissionError("admin only")
+     # authn done upstream, but no role check