fix: clamp rewards to open interval (0.01, 0.99) for Task Validation

docs: update API endpoints table with Phase 2 runtime endpoints

ci: add GitHub Actions workflow to auto-sync to Hugging Face Space

fix: add Phase 2 runtime endpoints and track uv.lock for Phase 1

fix: restore server/app.py with main() for openenv validate multi-mode

fix: restore [project.scripts] server entry point for openenv validate

fix: standalone inference, correct log format, openenv-core dep

intial project push