refactor: update judge model to Qwen2.5-72B, standardize environment variables, and enhance task configuration schema

feat: reduce inference sample size and add complexity reasoning results dataset

refactor: update inference defaults, standardize openenv.yaml schema, and overhaul submission validation script

feat: add brace-counting fallback for Rust solution extraction and initialize result datasets

refactor: migrate inference script to use HF Space HTTP endpoints and update logging format

chore: update data directory path and synchronize project dependencies

refactor: update inference script to support multi-problem evaluation and synchronous execution

initial clean commit