fix(slm): fix frontend ownership before npm build in self-sync (#1624)

[mrveiss]

Summary

• Add sudo chown -R autobot:autobot for SLM frontend dir before npm ci
• Prevents permission errors when Ansible previously deployed root-owned files

Root Cause

Ansible deploys with become: true (root), creating root-owned node_modules/ and dist/. The self-sync path runs as the autobot service user, so npm ci fails trying to modify root-owned files.

Changed Files

• api/code_sync.py — ownership fix step in _build_slm_frontend()

Test Plan

• Create root-owned file in /opt/autobot/autobot-slm-frontend/node_modules/
• Trigger SLM self-sync via code-sync UI
• Verify chown runs before npm ci (check logs)
• Verify frontend build succeeds

Closes #1624

[github-actions]

✅ SSOT Configuration Compliance: Passing

🎉 No hardcoded values detected that have SSOT config equivalents!