feat: message notification

[bxy4543]

two serious change:
add get user func for db interface
controllers/pkg/database/interface.go
optimize notification struct
controllers/pkg/notification/api/v1/notification_types.go

[pull-request-size]

Whoa! Easy there, Partner!

This PR is too big. Please break it up into smaller PRs.

[sealos-ci-robot]

🤖 Generated by lychee action

Summary

Status	Count
🔍 Total	1036
✅ Successful	368
⏳ Timeouts	0
🔀 Redirected	0
👻 Excluded	667
❓ Unknown	0
🚫 Errors	0

Full action output

Full Github Actions output

[sweep-ai]

Apply Sweep Rules to your PR?

• Apply: All new business logic should have corresponding unit tests.
• Apply: Refactor large functions to be more modular.
• Apply: Add docstrings to all functions and file headers.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (552dac8) 65.45% compared to head (fea5e16) 65.45%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4350   +/-   ##
=======================================
  Coverage   65.45%   65.45%           
=======================================
  Files           8        8           
  Lines         660      660           
=======================================
  Hits          432      432           
  Misses        180      180           
  Partials       48       48           

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