fix notification read status

[bxy4543]

🤖[deprecated] Generated by Copilot at 3437890

Summary

✨🏷️👀

Add feature to mark notifications as read or unread in debt_controller.go. Use constants for label keys and values and set default to unread.

New feature added
Mark notifications as read
Unread by default

Walkthrough

• Add a new label to indicate the read status of notifications (readStatusLabel, falseStatus)

• Define two constants for the label key and value in debt_controller.go (link)
• Initialize and set the label for every notification in debt_controller.go (link)

[sealos-ci-robot]

🤖 Generated by lychee action

Summary

Status	Count
🔍 Total	1073
✅ Successful	395
⏳ Timeouts	0
🔀 Redirected	0
👻 Excluded	677
❓ Unknown	0
🚫 Errors	0

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