- system prompt = Dross (Ozriel's construct fragment, per Void 1.0), with tool guidance
- migration 008 renames the seeded agent 'companion' → display name 'Dross'
- removed lib/ai/anthropic.js + lib/ai/agent/runtime.js + tests + @anthropic-ai/sdk dep (companion now runs via the claude CLI; kept lib/ai/secret.js for the Vaultwarden roadmap)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
