Add a Licenses tab in the repo header that shows when license packages
exist for the repo's owner. The tab displays:
- License packages with name, duration, allowed channels, key count
- Issued keys with prefix, licensee, expiry, and status
Also includes:
- Org-level default update streams with per-repo override (#265)
- Full Joomla channel names in update feeds
- Update Feed button on releases page
- DB migration v336 for update_stream_config table
The Licenses tab appears after Packages in the repo header, gated by
whether any license packages exist for the owner.
Ref #239, #265
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>