Convert 'Batch' to model dict

[peterdudfield]

as described here, change Batch object in dict object for model. Hopefully they are clear what shape they should be, and how they should be used

the following keys are needed

• hrvsatellite_actual (batch_size x 12 historical timesteps x 1 channel x 128 pixels high x 256 pixels wide)

• hrvsatellite_t0_idx

• hrvsatellite_y_osgb

• hrvsatellite_x_osgb

• hrvsatellite_y_geostationary

• hrvsatellite_x_geostationary

• hrvsatellite_time_utc

• nwp

• nwp_t0_idx

• nwp_target_time_utc

• nwp_init_time_utc

• nwp_y_osgb

• nwp_x_osgb

• pv

• pv_t0_idx

• pv_system_row_number

• pv_y_osgb

• pv_x_osgb

• pv_time_utc

• gsp

• gsp_t0_idx

• gsp_id

• gsp_y_osgb

• gsp_x_osgb

• gsp_time_utc

Optional extra, make this into pydantic object

[jacobbieker]

Closing this as using datapipes