add four new appreciation options to the dialog

[ivannissimrch]

Description

Adds the four new options to the Add Appreciation dialog: Need4Deed certificate, cap, notebook and city certificate. Previously, only tote bag, t-shirt, and benefit card were offered.

Blocked on the backend.
Saving one of the new options currently returns a 400. sdk-types.json in the backend still lists only the old three values, so the request is rejected during validation. Issue: 837. Everything else is in place; the database migration and the SDK both have all seven.

Related Issues

Closes #872

Changes

• Four entries added to APPRECIATION_TYPES in AppreciationDialog.tsx
• German cityCertificate corrected to Senatsurkunde

Screenshots / Demos

Checklist

• WITHIN THE SCOPE OF AN ISSUE; No unnecessary files included
• Tests added/updated
• Documentation updated
• CI passes

[ivannissimrch]

Note on order: this needs BE 845 to merge first. Until then, the four new options appear in the dialog, but saving one returns a 400, since the request validation schema still lists only the original three values.