Create or update tariff display information. This action supports both first-time creation and subsequent updates.

Field replacement behavior:

• priceInformation, totalCostInformation, priceInformationLocalized, totalCostInformationLocalized, and plainTextModeEnabled are partial updates: omitted fields are left untouched; send null to clear a text field.
• A localized map replaces all stored translations for that text — omitted locales are deleted. When both a scalar field and its localized sibling are sent, the localized one wins.
• defaultPriceInformation and defaultPriceInformationOffline are always replaced; omitting them resets the stored value to empty.

Deprecated fields: The defaultPriceInformation and defaultPriceInformationOffline fields are deprecated. Use the tariff group resource to manage these fields instead. The scalar priceInformation and totalCostInformation fields are deprecated in favor of their Localized siblings, which support multi-locale round-tripping.