downstars /work debug endpoint could use some polish

[leftwo]

the /work endpoint on a downstairs could use some cleanup:

An example:

18:31:25.003Z INFO crucible: Active Upstairs connections: [ConnectionId(0)]
18:31:25.003Z INFO crucible: Crucible Downstairs work queue:
18:31:25.003Z INFO crucible:   JOB_ID IO_TYPE STATE DEPS
18:31:25.003Z INFO crucible: 172750877  EClose  [JobId(172750876)]
18:31:25.003Z INFO crucible: 172750880  ReOpen  [JobId(172750879)]
18:31:25.003Z INFO crucible: Completed work []
18:31:25.008Z INFO crucible: request completed

The STATE column is probably obsolete now.
The active upstairs connection should print out what it has, like session and whatever else we hold.