## Summary
- Add reverse-DNS namespace format validation for server names
(namespace/name)
- Validate remote URLs match the DNS namespace derived from hostname
- Prevent duplicate remote URLs across different servers
- Support localhost/development URLs without namespace restrictions
- Add comprehensive test coverage for validation logic
- Update database layer to support remote_url filtering
Fixes#180 by ensuring proper namespace governance and preventing URL
conflicts.
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Co-authored-by: Claude <noreply@anthropic.com>
