feat(tomtom_incidents): TomTom real-time traffic incidents adapter (v0.9.5)

Fourth CENTRAL_TRAFFIC event adapter. Complements wzdx (federal work zones) and
state_511_atis (state-DOT reports) with TomTom commercial vehicle-telematics
coverage. Polls the Orbis incidentDetails endpoint per metro bbox, emits one
event per incident to central.traffic.incident.<state>. Ships disabled.

central-supervisor + central-gui restart only -- adapter row on the EXISTING
CENTRAL_TRAFFIC stream, so NO archive restart and no new stream/dependency.
Reuses the existing "tomtom" api key.

- Bbox limit refutation: incidentDetails rejects bbox > 10,000 km^2, so coverage
  is per-metro bboxes (Treasure Valley / Boise, 8,601 km^2), NOT statewide. One
  bbox @ 1800s = 1,440 calls/mo = 58% of the 2,500/mo free-tier cap. Expansion
  rows must respect N*(43200/cadence_min) <= 2500.
- category="incident.tomtom_incidents" -> GUI event_type "incident" (shared with
  state_511_atis; cross-source overlap is by design = additive coverage, distinct
  dedup ids + categories, no Central-side cross-source dedup).
- Severity from magnitudeOfDelay (0->1,1->1,2->2,3->3,4->4; 4=closure). Never None.
- geo.geometry carries TomTom's Point/LineString directly (already lon/lat GeoJSON;
  the v0.9.3 framework renders the affected road as a polyline). No decode needed.
- Dedup id <state_code>:tomtom:<tomtom_id> (upstream id stable across polls,
  verified 154/154 over 60s). Inherits the v0.9.1 dedup mixin.
- aiohttp params= URL-encodes the fields{} GraphQL braces (no curl-glob issue);
  key redacted from logs; poll skips cleanly without a key.

Full suite: 809 passed, 1 skipped (central and unprivileged zvx, 3x each).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/central/gui/routes.py

@@ -2658,7 +2658,7 @@ ADAPTER_GROUPS = {
     "Space": ["swpc_alerts", "swpc_kindex", "swpc_protons"],
     "Geophysical": ["usgs_quake", "nwis"],
     "Earth Observation": ["eonet"],
-    "Transportation": ["wzdx", "state_511_atis", "tomtom_flow"],
+    "Transportation": ["wzdx", "state_511_atis", "tomtom_flow", "tomtom_incidents"],
 }
 # Same palette the map legend uses, indexed by sorted-adapter position.
 EVENTS_PALETTE = [