outer-loop status should show in-progress candidates

[lukeinglis]

Problem

factory outer-loop status only shows completed evaluations. While candidates are mid-run (improve cycle or gate scoring), the output looks like nothing is happening:

=== Outer Loop Status ===
Benchmark: forecastbench
Generation: 0
Total evaluations: 0
Best score: 0.0000
Budget remaining: 9

Meanwhile, a sub-CEO is actively running an improve cycle and the gate is scoring in a worktree — but the status command gives no indication of this. The only way to see progress is to watch the terminal where evaluate is running.

Observed behavior

Ran factory outer-loop calibrate followed by factory outer-loop evaluate. The evaluate command runs in the foreground and streams logs, but factory outer-loop status (from another terminal) shows 0 evaluations even though a candidate has completed its improve cycle and is being scored by the gate.

Expected behavior

factory outer-loop status should show:

• Which candidates are currently being evaluated
• What phase each is in (improve cycle / gate scoring / complete)
• Elapsed time per candidate
• Which worktree each candidate is running in

Something like:

=== Outer Loop Status ===
Benchmark: forecastbench
Generation: 0
Total evaluations: 0 (1 in progress)
Budget remaining: 9

In progress:
  evolve-gen0-0d4cc86a  [gate scoring]  3m12s  wt-evolve-gen0--7a8111fd

Completed:
  (none yet)

Context

This came up during the first real evaluation run with the forecastbench benchmark (PR #1332). Each candidate takes several minutes (improve cycle + 2-round gate with API calls), so there's a long window where status looks empty.