Weekly Base64 task: keep encoding rules explicit

For a recurring Base64 conversion, write down whether the input is text or binary, which text encoding is used, and whether output padding or line breaks are required. Run one small known sample before processing the week's data. Decode a representative result and compare it with the source. Keep sensitive values out of untrusted online converters, since Base64 does not conceal them. A repeatable checklist prevents subtle changes in newline handling or character encoding.