- Add slug field with uniqueness constraint to Organization
- Use python-slugify to generate slug from name and import that in migration
- Require name in all /rename and org creation requests
- Auto-generate slug for new org with no slug or when /rename is called w/o a slug
- Auto-generate slug for 'default-org' based on name
- Add /api/orgs/slugs GET endpoint to return all slugs in use
- tests: extend backend test-requirements.txt from requirements to allow testing slugify
- tests: move get_redis_crawl_stats() to avoid extra dependency in utils
