Migration copies ANTHROPIC_API_KEY value → DEEPSEEK_API_KEY (DeepSeek key was saved before the rename), then deletes ANTHROPIC_API_KEY and VOYAGE_API_KEY rows. ALLOWED_KEYS now only lists active provider keys. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CPf5Rc8QPx6V8KLEEgfKEQ