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/xcloud-docker-deploy/.clawhubsafe

@@ -0,0 +1,23 @@
+# ClawHub Safety Manifest
+# This skill contains no executable code — documentation only.
+# All files listed below are verified safe for AI agent consumption.
+
+safe_files:
+  - SKILL.md
+  - README.md
+  - SECURITY.md
+  - CHANGELOG.md
+  - LICENSE
+  - assets/github-actions-build.yml
+  - references/xcloud-constraints.md
+  - references/scenario-build-source.md
+  - references/scenario-proxy-conflict.md
+  - references/scenario-multi-service-build.md
+  - examples/rybbit-analytics.md
+  - examples/custom-app-dockerfile.md
+  - examples/fullstack-monorepo.md
+
+no_executables: true
+no_network_calls: true
+no_subprocess: true
+no_system_modifications: true