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/016-info-exposure/code/app.py

@@ -0,0 +1,5 @@
+def handler(event):
+    try:
+        return do_work(event)
+    except Exception as e:
+        return {"statusCode": 500, "body": str(e)}

skills/hermaguard/tools/hermaguard-benchmark/bugs/016-info-exposure/ground-truth.json

@@ -0,0 +1,17 @@
+{
+  "title": "Stack trace returned to client",
+  "description": "Bare handler returns exception text in the HTTP response body.",
+  "severity": "MEDIUM",
+  "category": "security",
+  "findings": [
+    {
+      "file": "app.py",
+      "trigger": "exception text returned in response body",
+      "description": "Internal paths, queries, and versions leaked to clients",
+      "severity": "MEDIUM",
+      "classes": [
+        "CWE-200"
+      ]
+    }
+  ]
+}

skills/hermaguard/tools/hermaguard-benchmark/bugs/016-info-exposure/pre.diff

@@ -0,0 +1,4 @@
+--- a/app.py
++++ b/app.py
+@@ -0,0 +1 @@
++ (new file — the bug is introduced by this change)