EDF labels not preserved in Samples object

[ericphanson]

as claimed by

OndaEDF.jl/src/import_edf.jl

Lines 506 to 507 in fc8709d

	The `label` of the original `EDF.Signal`s are preserved in the `:edf_channels`
	field of the resulting `SamplesInfo`s for each `Samples` generated.

That is not possible with Legolas v0.5 / Onda v0.15. I think probably this info needs to be propagated out another way. I do think it's useful info to get.

[kleinschmidt]

Oof, good catch. They're propagated in the plan table (for the reasons you mentioned). We could also define a schema extension which might be a better way to go if we really want to make sure that these labels are always propagated, even if you don't save the plan

[ericphanson]

I think a schema extension wouldn't work since Onda.Samples requires SamplesInfoV2: https://github.com/beacon-biosignals/Onda.jl/blob/dd5d23bd17aab5b07520e40342421829516ef838/src/samples.jl#L52