Retrieve the metadata for the given file, including the record it is attached to and its view/download URLs. The file contents are not returned; use Download file for that. The required permission depends on the file's link type: person files require Read Files; business files require Limited Write Contributions or Full Write Accounting; batch and transaction_file files require Limited Read Contributions; bank_reconciliation and journal_entry files require Full Read Accounting; safeguard files require Read Safeguards; group files require being an administrator or member of the group; sermon files require no permission beyond a valid API key; other link types follow the permissions of the record the file is attached to.