Validate RSS/Atom feeds

[dannon]

Description

Verify that the RSS and Atom feeds generated by Astro are valid and complete.

Tasks

1. Run feeds through W3C Feed Validation Service
2. Compare feed output with Gridsome version
3. Ensure all required fields are present
4. Test feed reader compatibility (Feedly, etc.)

Feed URLs

• /news/feed.json (JSON Feed)
• /events/feed.json (JSON Feed)

May also want to add traditional RSS/Atom XML feeds for broader compatibility.