Embat Attributes API

`Attribute` represents a custom field that you can define once and then use to tag records across Embat, such as an ERP dimension, a cost center or any other analytic field you want available as a filter in tables, charts and reports. `customId` is the unique identifier of an attribute: set your own value to use as your ERP dimension ID, or let Embat auto-generate one.An attribute has a `type` — `list` (a fixed set of `values` to choose from), `string` or `number` (free-form value) — and can optionally be nested under a parent attribute via `parentCustomId` to model hierarchies (e.g. a "City" attribute whose values are nested under a "Country" attribute's values).Attribute values are attached to other entities — `Payments`, `Contacts`, `Operations`, `Transactions` and `AccountingEntries` — by sending the attribute's `customId` together with the chosen `value`/`valueCustomId` in that entity's `attributes` field.**Typical flow:**1. **Create the attribute** with `POST /attributes/{companyId}`, defining its `type` and, for `list` attributes, its `values`:```jsonPOST /attributes/{companyId}{ "customId": "cost-center", "source": "erp", "name": "Cost Center", "type": "list", "values": [ { "customId": "marketing", "name": "Marketing" }, { "customId": "sales", "name": "Sales" } ]}```2. **Tag other entities with the attribute.** When creating or updating a payment, contact, operation, transaction or accounting entry, reference the attribute in its `attributes` field:```json{ "customId": "marketing", "value": "Marketing"}```3. **Maintain the value list** with `POST /attributes/{companyId}/{customId}/values/bulk` to add values without touching the rest of the attribute, or update the attribute directly to replace its full value list.