refactor: full OpenEnv REST API compliance with FastAPI + strict 0.1-0.9 scoring

fix: add graders.py to Docker image copy - critical missing file for HF evaluation

fix(deploy): Implement dummy server to satisfy HF running state & POST requirements

Update model to Qwen2.5-Coder-32B-Instruct

Update model to Qwen2.5-7B-Instruct and add explicit tool schemas to system prompt

Update default model to Qwen2.5-Coder-32B-Instruct

fix: switch to HF's new router.huggingface.co endpoint (deprecated api-inference)

docs: add HF Spaces deployment guide and update Dockerfile with correct defaults

Initial commit: OpenEnv-CloudSOC benchmark environment