Tell Soul to wait for long jobs before reporting

Two consecutive Soul passes on Cut 6b ended their turn while a mutation run
or a build was still going, delivering no findings until Self resumed them.
The Hands brief has carried this rule since the Ghostlight run; the Soul
brief now carries it too.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

references/briefs.md

@@ -152,6 +152,9 @@ Report findings only.
 - Use a temporary detached worktree for other checkouts, and remove it
   afterwards.
 - Do not run <expensive runtime> unless told.
+- Long jobs: poll the log until they finish and then report. Never end the
+  turn while a build or a mutation run is still going; a turn that ends on
+  "waiting for cargo" delivers no findings and has to be resumed by hand.
 
 Scope: <repo> <branch>, commits <range> (base <sha>). Spec: <section>.
 

references/changelog.md

@@ -27,6 +27,10 @@ harness audit").
 - **The committed suites forbade a control by shape.** Each threw when a
   replacement changed nothing. A table shape that cannot express "change
   nothing" cannot test itself.
+- **Soul brief: wait for long jobs.** The Hands brief had this rule since the
+  Ghostlight run; the Soul brief did not, and two consecutive Soul passes on
+  Cut 6b ended their turn with "waiting on the script" and had to be resumed
+  by Self before any finding arrived.
 
 ## 2026-09-16: record the gap, and absence is the hardest claim