Ref: ado/operational_pipelines#11

Ref: ado-pipeline#5

Ref: ado-download_operational#6 (comment 31520)

Adapted the path according to #3 (comment 31377)

Ref: ado/operational_pipelines#3 (comment 31311)

closes #2

closes #1

closes #2

before all data was lazy loaded and a subset on time done,
but time dimension is not correct before aggregation (correct values in
valid time). Now only file of the date is loaded and no subsetting done.

Ref: ado-pipeline#1