Implement Group History

[GR0ZA]

1. Add a new DB table: group_history
   id | group_id | text | issuer_id | action_type

2. Add action_type Enum:
   CREATE_GROUP | (CREATE_BILL) | UPDATE_GROUP | JOIN_GROUP | RESET_GROUP & maybe some other

3. Add new endpoint: GET /api/group/{id}/history

• maybe with pagination as optional parameter (50 entries per page)

4. Add groupHistoryDTO:
   text: "created a new bill: Einkaufen"
   action_type
   issuer

[f-odc]

Where do we want to include the information about the required transactions to clear all bills from the group?

We could change this issue to: Implement History From User, which include all the above mentioned data as well as the clear transactions. In the history all changes from the groups in which the user is would be displayed as well as all transactions which are created on group deletion.