fix: fix some bugs with cache

[Damego]

About

This pull request fixes these bugs:

• An error occured dispatching channel_update: 'NoneType' object has no attribute 'id'
• on_message_update(before, after) before always is None When you edit a message which not in cache
• Wrong getting id of models

Checklist

• I've ran pre-commit to format and lint the change(s) made.
• I've checked to make sure the change(s) work on 3.8.6 and higher.
• This fixes/solves an Issue.
  • (If existent):
• I've made this pull request for/as: (check all that apply)
  • Documentation
  • Breaking change
  • New feature/enhancement
  • Bugfix

[Damego]

Draft until I test everything

[EepyElvyra]

if it works, LGTM!

[Damego]

I will test it more tommorow. I wanna sleep

[Damego]

I didn't get any error so we can merge it ig