Returns a list of all tabular (table-based) fields available in the account. Each table includes its alias and the fields it contains with their IDs, names, and types. Use this endpoint to discover which table names are valid for the table row endpoints (e.g., jobInfo, compensation, employmentStatus). For fields whose type is list, multilist, or another option-backed type, the field id can be matched to fieldId from list-list-fields to retrieve the account-level option list.