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/020-missing-authn/code/app.py

@@ -0,0 +1,4 @@
+def reset_password(request, user_id: int):
+    new_pw = request.json["password"]
+    db.execute("UPDATE users SET pw = ? WHERE id = ?", (hash(new_pw), user_id))
+    db.commit()

skills/hermaguard/tools/hermaguard-benchmark/bugs/020-missing-authn/ground-truth.json

@@ -0,0 +1,18 @@
+{
+  "title": "State-changing route without authentication",
+  "description": "POST handler has no session check; anonymous requests reset any account.",
+  "severity": "CRITICAL",
+  "category": "security",
+  "findings": [
+    {
+      "file": "app.py",
+      "trigger": "state-changing handler without session/auth check",
+      "description": "Account takeover by anonymous callers",
+      "severity": "CRITICAL",
+      "classes": [
+        "CWE-306",
+        "CWE-287"
+      ]
+    }
+  ]
+}

skills/hermaguard/tools/hermaguard-benchmark/bugs/020-missing-authn/pre.diff

@@ -0,0 +1,6 @@
+--- a/app.py
++++ b/app.py
+ def reset_password(request, user_id: int):
+-    if not request.session.get("user"):
+-        raise PermissionError("login required")
+     new_pw = request.json["password"]