[FEATURE] Add "Note" field to account for unexpected problems

[jmargutt]

Who requested this feature?

Jeroen

User Stories

As a relief volunteer/delegate I want to write down if a beneficiary has a particular problem or needs follow-up So I can easily deal with challenges during the distribution

What needs to be done

• [ ] Implement it

Acceptance Criteria

• [ ] Tested and reviewed
• [ ] Documented the changes

Additional context

See ReliefBox workshop Miro board.