List planned transaction occurrences

List individual dated occurrences of planned transactions within a date range, expanded from recurrence rules. Each item represents one expected cash event on a specific date. Amount semantics: `amount.value` is the **net** amount excluding pass-through taxes (e.g. VAT). When the underlying planned transaction has VAT, the tax portion is returned **separately** as `passThroughTaxAmount` — it is **not** included in `amount.value`. To compute the total gross cash inflow / outflow for a period (e.g. for a cash flow forecast that matches what hits the bank account), sum `amount.value + (passThroughTaxAmount?.value ?? 0)` over all items. To compute net planned revenue / cost (excluding VAT, matching P&L), sum only `amount.value`. Use pagination (`limit`, `offset`) to fetch all items — `totalCount` is the unpaginated total.

curl -X GET "https://example.com/companies/string/planned_transaction_occurrences?startDate=string&endDate=string"

{  "items": [    {      "id": "string",      "plannedTransactionId": "string",      "date": "string",      "computedStartDate": "string",      "computedEndDate": "string",      "usingPeriodDays": 0,      "amount": {        "value": 0,        "currency": "string"      },      "passThroughTaxAmount": {        "value": 0,        "currency": "string"      },      "accountId": "string",      "categoryId": "string",      "counterparty": {        "type": "customer",        "id": "string"      },      "counterpartyName": "string",      "counterpartyLogoUrl": "string",      "name": "string",      "startDate": "string",      "recurrence": null,      "overrides": {        "property1": null,        "property2": null      },      "source": "string"    }  ],  "totalCount": 0}