v0.3.1 — All paths within ~/.openclaw/semcom

Hardening for restricted environments (e.g. containers where only ~/.openclaw/ is writable).

• Log file moved from ~/.openclaw/logs/semcom-hooks.log to ~/.openclaw/semcom/semcom-hooks.log — no longer depends on a logs/ subdirectory existing
• Install staging moved from /tmp/semcom-install to ~/.openclaw/semcom/install — no /tmp access required
• All installation artifacts now live exclusively within ~/.openclaw/semcom/ or ~/.openclaw/hooks/semcom-start/ (both managed by openClaw)