Transform raw data to prod to be used in features later

[VMois]

BQ has powerful functions that work with GEOGRAPHY data. I will need them to calculate the average wait time on a stop.
To use those functions, I need to convert raw latitude and longitude coordinates to BQ native Geography Point. In particular, I care about two tables: vehicle_position and stops. vehicle_position contains bus GPS coordinates + timestamp,
stops contains the GPS coordinates of the stops.

The aim of this epic is to design DAGs that transform lat and lon columns in vehicle_position and stops tables to BQ Geography Point. Transformed data will be saved as new tables in the prod stage (together with not-transformed data). This aligns with the second column in the diagram from the data flow article - https://vmois.dev/data-flow-bigquery-miwaitway/. Later, using those prod tables, I will be able to calculate average wait time, etc.