feat: skill expansion — browser, security, SQL, files (16 skills total)

Novas skills instaladas:
- openclaw-agent-browser   v1.0.0  CLI Chromium — navegação, login, screenshots, state
- skill-security-audit    v1.0.0  SAST scanning, prompt injection, secrets audit
- sql-toolkit             v1.0.0  PostgreSQL/MySQL/SQLite — schema, query, otimização
- file                    v1.0.0  Organização de arquivos por contexto
- file-summary            v1.0.0  Extração e resumo de PDFs, Word, Excel

Workspace expandido:
- TOOLS.md: +Browser automation, Security audit, SQL, File management
- AGENTS.md: +Linux Analyst section (comandos, logs, rede, scripts) + Full-stack strategy
- MEMORY.md: 16 skills indexadas, stack map, comandos Linux ref
- SESSION-STATE.md: atualizado com contexto completo
- lock.json: sincronizado com 16 skills instaladas

skills/e2e-testing-patterns/.clawhub/origin.json

@@ -0,0 +1,8 @@
+{
+  "version": 1,
+  "registry": "https://clawhub.ai",
+  "slug": "e2e-testing-patterns",
+  "installedVersion": "1.0.0",
+  "installedAt": 1779234199236,
+  "fingerprint": "f6f6aba791515c5f86057f1aaace7c0753fe6959a22cc3535cd968a38e5d812a"
+}