Add port validation to connection address

[flyingsilverfin]

Release notes: product changes

We improve the error UX which now tells the user when the required port in the connection URI is missing.

Motivation

Observed a user not knowing that they must write the port!

Implementation

AI extended the existing validation with one new one.

[netlify[bot]]

✅ Deploy Preview for typedb-studio ready!

Name	Link
🔨 Latest commit	3976d49b35f5956fd6d5d019c0707754c0eb38a3
🔍 Latest deploy log	https://app.netlify.com/projects/typedb-studio/deploys/6944fb4b8c59aa0008cd3b47
😎 Deploy Preview	https://deploy-preview-891--typedb-studio.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.