correlator: keep the tiebreak for typed / reassignment calls in the orphan gate (#115)

_call_is_substanceless mirrored has_event_substance but not the creation gate's type-resolved short-circuit, so a routine-severity fire/medical call with no coords/tags/vehicles — or a reassignment (unit pulled to a new job) — could be gated to orphan where rules would open an incident. Bail out of the gate on incident_type or reassignment.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Claude-Session: https://claude.ai/code/session_01Tbknwttzou4s46PAykmtix

drb-c2-core/tests/test_consensus_gate.py

@@ -133,6 +133,25 @@ async def test_call_with_vehicles_is_not_gated():
     m_tiebreak.assert_called_once()
 
 
+async def test_call_with_resolved_incident_type_is_not_gated():
+    # The creation gate skips has_event_substance when a type resolved, so a
+    # typed call (fire/medical/…) opens an incident on substance the gate does
+    # not re-check — it must keep the tiebreak, not be dropped.
+    m_apply, m_tiebreak = await _run_consensus(
+        _preview("new", {}, ctx={"incident_type": "fire"}), _llm("orphan"),
+    )
+    m_tiebreak.assert_called_once()
+
+
+async def test_reassignment_call_is_not_gated():
+    # reassignment=True is dispatch pulling a unit onto a NEW job (units are
+    # blanked for exactly that reason) — the strongest new-incident signal.
+    m_apply, m_tiebreak = await _run_consensus(
+        _preview("new", {}, ctx={"reassignment": True}), _llm("orphan"),
+    )
+    m_tiebreak.assert_called_once()
+
+
 async def test_recent_incident_on_same_talkgroup_is_not_gated():
     ctx = {
         "system_id": "sys-1",