Use a `URLSensor` to wait for the whole wikitext snapshot
The default behavior of Spark tasks is to process all Wikipedias. Hence,
a NamedHivePartitionSensor
won't work if we wait for the whole
wikitext monthly snapshot, while it's fine if specific Wikipedias are
passed.
- Separate the wikitext sensor building logic accordingly
- set the poke interval of all sensors to 1 hour, as we do section topics and image suggestions DAGs