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/014-partial-write/code/app.py

@@ -0,0 +1,4 @@
+def transfer(conn, from_id, to_id, amount):
+    conn.execute("UPDATE accounts SET balance = balance - ? WHERE id = ?", (amount, from_id))
+    conn.execute("UPDATE accounts SET balance = balance + ? WHERE id = ?", (amount, to_id))
+    conn.commit()

skills/hermaguard/tools/hermaguard-benchmark/bugs/014-partial-write/ground-truth.json

@@ -0,0 +1,18 @@
+{
+  "title": "Non-atomic multi-step update",
+  "description": "Two-table update without transaction; crash between statements corrupts state.",
+  "severity": "HIGH",
+  "category": "data-integrity",
+  "findings": [
+    {
+      "file": "app.py",
+      "trigger": "two dependent updates without a wrapping transaction",
+      "description": "Crash mid-sequence loses money \u2014 debit without credit",
+      "severity": "HIGH",
+      "classes": [
+        "HG-PARTIAL-WRITE",
+        "CWE-362"
+      ]
+    }
+  ]
+}

skills/hermaguard/tools/hermaguard-benchmark/bugs/014-partial-write/pre.diff

@@ -0,0 +1,7 @@
+--- a/app.py
++++ b/app.py
+ def transfer(conn, from_id, to_id, amount):
+-    with conn:
+         conn.execute("UPDATE accounts SET balance = balance - ? WHERE id = ?", (amount, from_id))
+         conn.execute("UPDATE accounts SET balance = balance + ? WHERE id = ?", (amount, to_id))
+-    conn.commit()