feat: add --provider-only flag to pin OpenRouter routing

feat: extend reasoning_effort to qwen/* and z-ai/*; add Qwen3-VL and GLM-4.6V

feat: enable thinking effort for Google Gemini models (default high)

feat: enable extended thinking for Claude models (anthropic/*)

fix: encode question images as PNG (lossless) instead of JPEG

Fix remaining old model references in CLAUDE.md, README, llm_interface.py

Log response metadata (tokens, cost, latency) from OpenRouter API

Add reproducibility controls, leaderboard, and contamination disclosure

Fix 7 medium-priority issues: resume, timeout, logging, prompts, dead code

Fix 5 high-priority bugs: caching, rate-limit retry, scoring, types, error msg

JEE Advance 2024 added

Refactor: Generalize benchmark for JEE and NEET exams

Huggingface dataset compatibility

Improved huggingface compatability

With more clear summary report and reattempt mechanism

First working version