Read a bounded slice of a job's output log

Returns the job's output — stdout and stderr interleaved exactly as a terminal would show them. With no range parameters you get the TAIL of the log (default 200 lines), which is what you want for 'how is it going?'. To follow a growing log without re-reading it, feed the previous reply's nextOffsetBytes back as offset_bytes. Every reply is capped at 262144 bytes (256 KiB) decoded, so a huge log is paged rather than dumped; chunk is base64 because process output is arbitrary bytes, not necessarily valid UTF-8. eof: true means you have read to the current end of the file, NOT that the job finished. Unlike /api/v1/exec the job is never killed for producing too much output; truncated: true means the 256 MiB log file itself hit its cap and the agent stopped recording while the job kept running.