Retrieves all accounting event groups associated with a specific leasing contract.

Accounting event groups represent collections of related accounting events, typically
associated with operations such as rent collection, deposit refunds, balance adjustments,
or charges regularisations.

The endpoint supports optional filtering by nature and returns paginated results
ordered by most recent first.

Filterable parameters:

• nature: Filter by group type (rent, bank_transactions, invoice, refund_deposit, charges_regularisation, balance_adjustment)