40f055cb57
- Add promo discount system for deepseek-v4-pro (75% off until 2026-05-31) - Rewrite StreamGemini to handle both SSE and JSON array response formats, fixing 0-token logging for gemini-3-flash and gemini-3-flash-preview - Fall back to model group name for cost lookup when concrete model isnt in the registry (fixes $0 cost on deepseek-auto entries) - Move registry lock before FindModel call to fix data race