feat: add cancelled task status — LLM was returning 500 when trying to cancel tasks; adds enum value, Alembic migration (ALTER TYPE), and 400 validation guards on create/update task routes
## Summary
- feat: add `cancelled` task status — LLM was returning 500 when trying to cancel tasks; adds enum value, Alembic migration (ALTER TYPE), and 400 validation guards on create/update task routes
Blocking a user prevents them from interacting with repositories, such as opening or commenting on pull requests or issues. Learn more about blocking a user.
Summary
cancelledtask status — LLM was returning 500 when trying to cancel tasks; adds enum value, Alembic migration (ALTER TYPE), and 400 validation guards on create/update task routes