A completed backfill covered every endpoint of the network's family.
The network's endpoints no completed backfill covered, in paging order.
The latest run under the pair's workflow id: running, or how it closed
without completing. null when none ran, the last one completed (coverage
shows it), or runs were not read (runsRead). workflowId is the
Temporal id the run is listed under.
One address on one watched network, and what its backfills covered.