EVALS_DATA_DIR default, mcq_choice_mismatch fix
Changed:
- EVALS_DATA_DIR defaults to ./evals-data when unset or blank — bare npx/bunx starts with no env setup (#2)
- evals_get_record description trimmed to the action, dropping the verification-subagent meta-coaching (#3)
Fixed:
- evals_create_draft / evals_revise_draft report mcq_choice_mismatch (was task_type_constraint) when an mcq grader's correct is not in choices[] (#1)
151 tests pass; bun run devcheck clean.