User reported a ~ Google Gemini bill against an expected ~ budget.
Permanent ban on Gemini for this project — all LLM inference goes through
claude -p --model sonnet (CLAUDE_CODE_OAUTH_TOKEN) or OPENROUTER_API_KEY as
fallback. The 10 scripts in scripts/ that import google-genai/-generativeai
are moved under scripts/_archived-gemini/ with a DO-NOT-RUN README. Project
memory updated (feedback-no-gemini-ever.md) and the older reference note that
recommended gemini-3.1-pro-preview is revoked.
