intelligence: traffic stops and self-initiated activity open incidents

Owner: traffic stops should show on the portal — otherwise they are only
visible in the archive. In the 09-22 replay (server-26#170) every Ch 1
stop ("45 Adam on a stop, Eastbound Central Express", "CM2 on the stop,
southbound") came back from extraction untyped, untagged and routine —
read as status traffic after #138 — so the creation gate never opened one.

- prompt: a unit reporting its own activity (on a stop, out with a vehicle
  or pedestrian) is a real event: police, tagged, at least minor; the plate
  lookups for it belong to it.
- deterministic backstop after extraction: stop / "put me out with"
  phrasing adds a "traffic-stop" / "self-initiated" tag (the substance the
  creation gate counts), police type if none, minor if routine. Negated
  phrasing ("not pull the car over") is left alone; nothing is downgraded.

c2-core: 469 pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

drb-c2-core/tests/test_clearance_tracking.py

@@ -99,3 +99,19 @@ def test_reopen_only_for_a_call_after_the_close():
     closed = {"resolved_at": "2026-09-22T15:00:00+00:00"}
     assert ic._after_close(closed, datetime(2026, 9, 22, 15, 5, tzinfo=timezone.utc))
     assert not ic._after_close(closed, datetime(2026, 9, 22, 14, 55, tzinfo=timezone.utc))
+
+
+def test_traffic_stops_become_events():
+    from app.internal.intelligence import _self_initiated_backstop as b
+    for t in ("45 Adam on a stop, Eastbound Central Express.",
+              "11-0. CM2 on the stop, southbound, KFLA on the right.",
+              "Car 7, traffic stop, Route 9 at Main"):
+        tags, typ, sev = b(t, [], None, "routine")
+        assert "traffic-stop" in tags and typ == "police" and sev == "minor", t
+    tags, typ, sev = b("Charlie 1. You put me out with a pedestrian on a parkway", [], None, "routine")
+    assert "self-initiated" in tags
+    # negation and unrelated chatter stay untouched
+    assert b("Do you want me to not pull the car over", [], None, "routine") == ([], None, "routine")
+    assert b("45-8, go ahead.", [], None, "routine") == ([], None, "routine")
+    # an existing type/severity is never downgraded
+    assert b("on a stop", ["dwi"], "police", "moderate") == (["dwi", "traffic-stop"], "police", "moderate")