Separate residential and tertiary/services time series for decentralised heating

Currently the daily heating profile we use for the time series includes both residential and tertiary demand, so it has a peak at midday (for tertiary) and a peak in the evening (for residential). However, since these two peaks happen in different building stocks, we're underestimating the total peak demand by using only a single time series. Therefore we should split heating demand into residential and tertiary sectors. (In district heating it's OK because both sectors are served by the same source.)
We already have the total thermal energy demand in data/energy_totals.csv by sector, so we just need to find weekday and weekend daily profiles for tertiary and residential demand from somewhere. Sources to try: RLI, look on openmod forum, standard profiles for Germany, etc.