Signal through the API that modifications are being made

[rinkp]

Description

1. Improves the notifications (such as pending updates and sync pause) on the home page
2. Introduces notification counter to draw attention to the home page
3. Pauses sync API when decisions are created. 15 minutes is deemed reasonable. If no decisions are entered for more than 15 minutes, the secretary most likely is done entering decisions for that specific meeting.
4. Pauses sync API when decisions are deleted. 60 minutes on deletion to prevent accidentally deleting organs in other systems. Impact of a 60 minute sync delay is considered minimal while hardly any decisions are ever deleted
5. Bugfixes

Related issues/external references

Fixes GH-389.

Types of changes

• [X] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation improvement

[rinkp]

Psalm locally:

The PHPUnit tests are caused by the Notification helper. It loads FrontPageService which needs the ApiService which needs the MemberMapper from reportdb

[tomudding]

PHPStan locally:

[rinkp]

The phpstan issue seems to be related due to incompatibility between main and the new branch because of renaming database_doctrine_em.

Psalm will no longer complain if psalm.xml is modified in a PR