I has been observed Sanger wf sometimes produce incorrect contamination estimate for tumour samples.
If there is a fix, we should be able to run it to get correct contamination estimate for tumour sample without re-running the whole Sanger WGS variant calling workflow, will then apply update to ascat_metrics SONG analysis with new result files.
If there is no fix, we should be able to remove contamination result from qc_metrics payload produced by Sanger, this change shouldn't have any impact on Sanger variant calling result at all