fix(orchestrator): spawn the owning PM for a gate-failed assembled PR

The PR-review gate's pr_fail sends a cell->root / root->master PR back to
needs_revision, still owned by the cell/main PM. The dispatch side
(_dispatch_revision_coordination_roots) re-spawns the owning PM for any
PM-owned needs_revision task, but the readiness gate
(_readiness_check_role_for_status) only waived the dev/doc role restriction for
coordination tasks — and a gate-failed assembled PR has a project + branch, so
it is NOT coordination. Result: dispatch routed the cell PM, readiness refused
it ("state=needs_revision requires role in {developer,documenter} but agent
be-pm is cell_pm"), and the task deadlocked. Pass owner_is_pm (derived from the
task's assignee, like the dispatch side) so the readiness waiver also fires for
a PM-owned revision, not just coordination roots. QA stays excluded.

tests/unit/runtime/test_readiness_role_status_match.py

@@ -125,8 +125,48 @@ def test_qa_on_needs_revision_coordination_still_blocked() -> None:
 
 
 def test_pm_on_needs_revision_noncoordination_still_blocked() -> None:
-    """A normal (code) needs_revision task is still dev/doc-only for a PM."""
+    """A normal (code) needs_revision task is still dev/doc-only for a PM when it
+    is NOT PM-owned (owner_is_pm unset) — the raw default behaviour."""
     reason = AgentOrchestrator._readiness_check_role_for_status(
         agent_id="be-pm", role="cell_pm", status="needs_revision", is_coordination=False
     )
     assert reason is not None
+
+
+# ---------------------------------------------------------------------------
+# Gate-failed assembled PRs — the PR-review gate's pr_fail sends a cell->root /
+# root->master PR back to needs_revision, still owned by the PM. It is NOT a
+# coordination task (it has a project + branch), so the readiness waiver relies
+# on owner_is_pm (mirroring _dispatch_revision_coordination_roots). Regression
+# for the production deadlock: "spawn refused for be-pm ... state=needs_revision
+# requires role in {'documenter','developer'} but agent be-pm is 'cell_pm'".
+# ---------------------------------------------------------------------------
+
+
+def test_pm_on_needs_revision_owner_is_pm_allowed() -> None:
+    """A gate-failed assembled PR is PM-owned but NOT coordination; the owning
+    cell/main PM must be spawnable to revise it."""
+    for role in ("main_pm", "cell_pm"):
+        assert (
+            AgentOrchestrator._readiness_check_role_for_status(
+                agent_id="be-pm", role=role, status="needs_revision", owner_is_pm=True
+            )
+            is None
+        )
+
+
+def test_pm_on_verifying_owner_is_pm_allowed() -> None:
+    assert (
+        AgentOrchestrator._readiness_check_role_for_status(
+            agent_id="be-pm", role="cell_pm", status="verifying", owner_is_pm=True
+        )
+        is None
+    )
+
+
+def test_qa_on_needs_revision_owner_is_pm_still_blocked() -> None:
+    """owner_is_pm widens to the PM roles only — QA is still a misroute."""
+    reason = AgentOrchestrator._readiness_check_role_for_status(
+        agent_id="be-qa", role="qa", status="needs_revision", owner_is_pm=True
+    )
+    assert reason is not None