Customer Data Platform: value is probably not a dictionary

[iht]

This line is causing the linter to fail, because it is strange that the value is a dictionary:

dataflow-solution-guides/pipelines/cdp/cdp_pipeline/customer_data_platform.py

Line 40 in 9fb0d38

'coupon_upc': coupon_redempt_value['coupon_upc'] if coupon_redempt_value is not None else None,

We should write a test to make sure this works. If it is indeed a dictionary, let's add type annotations so the linter does not get confused. If it is not a dictionary, we should fix the pipeline.