YAML Parameters: `plot_wavefield` uses `time-interval` while `wavefield` uses `time_interval`

[int-ptr-ptr]

Issue:

For SPECFEM configuration .yaml files, parameter_parser looks for a "time-interval" node in plot_wavefield (display), but a "time_interval" node in wavefield (dump files).

These should probably be made the same.

Background

(up to date as of 2025-12-01)

It looks like the following are the only places in the code where these two are relevant (from a VS Code search) in devel:

SPECFEMPP/src/parameter_parser/writer/plot_wavefield.cpp

Lines 53 to 60 in b76591c

	const int time_interval = [&]() -> int {
	if (Node["time-interval"]) {
	return Node["time-interval"].as<int>();
	} else {
	throw std::runtime_error(
	"Time interval not specified in the display section");
	}
	}();

SPECFEMPP/src/parameter_parser/writer/wavefield.cpp

Lines 38 to 44 in b76591c

	const int time_interval = [&]() -> int {
	if (Node["time_interval"]) {
	return Node["time_interval"].as<int>();
	} else {
	return 0;
	}
	}();

It also appears that no .yaml files within devel at present use time_interval for wavefields, so the least intrusive fix would be to change "time_interval" to "time-interval".