Fix CI validation workflow: Add strict None checks for Mypy compliance

Fix final OpenEnv validator compliance: inference stdout format, Dockerfile deps, API vars, and grader bounds

Fix action_type validation in parse_action for robustness

Fix Hugging Face metadata: correct language field and add metadata block

Fix reward calculation logic in SupportTicketEnv to ensure proper accumulation across steps and resolve test failures.

Merge branch 'main' of https://huggingface.co/Sid8421/openenv-rl-environment

initial commit

fix: lint/type issues and ensure mypy/ruff pass

chore: include OSLogRateLimit=64

chore: prepare Round-1 OpenEnv submission (validator, evaluator, tests, CI, docs)

Initial Commit