Admin site slug rename command
Added an admin command and controller support for safely renaming site slugs.
What changed
- New console command for site slug rename operations.
- API and web controller updates to support slug changes.
- Operational tooling for fixing customer site URLs without manual database edits.
Why it matters
Site slugs are part of the public URL surface, so renaming them needs a controlled path. This update gives operators a safer workflow for support and migration cases.