Route log parsing tasks by collection size

[pitangainnovare]

Summary

• Route validation-triggered parse orchestration per collection, using the existing parse_<size> queue mapping.
• Preserve parse queue routing across parse wave retries and re-executions.
• Clean up task imports and remove unused legacy core/libs/chkcsv.py.
• Persist seeded translator_class values for log manager directories and normalize the default to classic.

Validation

• docker compose -f local.yml run --rm django pytest log_manager/tests.py metrics/tests/test_tasks.py metrics/tests/test_cleanup.py
• docker compose -f local.yml run --rm django python manage.py makemigrations --check --dry-run log_manager_config