feat: add SRE incident benchmark (Pivot 2 - Scenario A)

modified: debug_env/server/app.py

modified: inference.py

modified: debug_env/server/grader.py

modified: inference.py

modified: debug_env/server/grader.py

modified: inference.py

modified: .gitignore

modified: inference.py

modified: inference.py

fix: read API_KEY env var (validator-injected) with HF_TOKEN as fallback

fix: use health-check loop in start.sh and align openenv.yaml port to 7860

fix: update app_port to 7860 for HF Spaces compatibility

feat: complete debugging workflow with HuggingFace Inference API and OpenEnv Stage 1

first commit