Add strain channel name field to `Aframe` GraceDb model

I am requesting an additional field to be added to the Aframe GraceDB data model that allows the specification of the strain channel name the from which the event was analyzed. I see that the matched filter pipelines specify this in the Single Inspiral Table.

This will be useful for us to distinguish between events uploaded to playground/test from two distinct analyses (e.g. the O3 MDC and O4 run). For now, we are simply uploading an additional txt file artifact, but it would be extremely helpful to be able to filter these events directly with gracedb.