[Code scan] Handle header-only LSF and JH status output

[njzjz]

Found by a Codex global repository scan of deepmodeling/dpdispatcher at commit 98a9e08.

Problem
LSF and JH_UniScheduler status parsing assumes a second output line always contains job data. Header-only output with a trailing newline produces an empty second line, then split()[2] raises IndexError.

Relevant code

dpdispatcher/dpdispatcher/machines/lsf.py

Lines 131 to 136 in 98a9e08

	status_out = stdout.read().decode("utf-8").split("\n")
	if len(status_out) < 2:
	return JobStatus.unknown
	else:
	status_line = status_out[1]
	status_word = status_line.split()[2]

dpdispatcher/dpdispatcher/machines/JH_UniScheduler.py

Lines 107 to 112 in 98a9e08

	status_out = stdout.read().decode("utf-8").split("\n")
	if len(status_out) < 2:
	return JobStatus.unknown
	else:
	status_line = status_out[1]
	status_word = status_line.split()[2]

Impact
Polling can crash when a scheduler returns only headers for a completed, expired, or missing job instead of falling back to finish-tag logic.

Suggested fix
Strip empty lines, require a data row before indexing, and if no data row exists check the finish tag and otherwise return a terminal/unknown state intentionally.