Apr 9

1. 09:08

   Fix HF Space crash by updating Dockerfile ENV and adding robustness to environment initialization

   shreyas231219
   60c21c4
2. 09:02

   Enhance environments: replace easy/medium/hard with task1-task6, increase difficulty of backhalf tasks, and add granular grader partial rewards and penalties

   shreyas231219
   cf45353
3. 08:26

   Initialize OpenEnv Sandbox environment

   shreyas231219
   569613d