feat: add course type to certificate metadata

[apalchys]

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🤔 This is a ...

• [x] New feature
• [ ] Bug fix
• [ ] Performance optimization
• [ ] Refactoring
• [ ] Test Case
• [ ] Documentation update
• [ ] Other

🔗 Related issue link

Describe the source of requirement, like related issue link.

💡 Background and solution

Dima asked to do it

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• [x] Database migration is added or not needed
• [x] Documentation is updated/provided or not needed
• [x] Changes are tested locally

[github-actions[bot]]

📦 Next.js Bundle Analysis for client

This analysis was generated by the Next.js Bundle Analysis action. 🤖

⚠️ Global Bundle Size Increased

Page	Size (compressed)
global	111.02 KB (🟡 +2 B)

Details

The global bundle is the javascript bundle that loads alongside every page. It is in its own category because its impact is much higher - an increase to its size means that every page on your website loads slower, and a decrease means every page loads faster.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

If you want further insight into what is behind the changes, give @next/bundle-analyzer a try!