feat: proper task design — realistic scenarios, clearer graders, auto-validate

fix: add /health, /metadata, /schema, /mcp endpoints + per-task graders

Compliance alignment: Use get_tasks() method and boolean grader flags for better OpenEnv discovery.

Refine task validation: Explicit grader refs and tasks property.

Fix task validation: Ensure 7 tasks with graders and get_tasks() method.

feat: implement step-level status tracking in environment and dashboard

Fix dashboard sync for queue and progress tracking

Env: Expand sentiment list with Happy, Panicked, Concerned, and Curious

Standard API: Implement step/reset/state compliance in CustomerSupportEnv

Standard Template Restructuring: Passes openenv validate