refactor!: make addrkit a multi-city address normalizer

- remove the events/outages module, ArcGIS adapter, portal config and event statuses
- add a configurable city dictionary/parser and make City part of StreetKey
- seed: read city/city_name, namespace IDs by city, keep structures distinct
- fix reliability: schema v2 with fail-closed load, deterministic ordering,
  input limits, config validation, atomic DB publish, LLM response caps
- add read-only shadow mode comparing the old ES path with addrkit
- breaking: registry.db must be re-seeded; config has no portal section

internal/seed/realdata_test.go

@@ -29,7 +29,7 @@ func TestRealRegistryParseRate(t *testing.T) {
 	if err != nil {
 		t.Fatalf("read registry: %v", err)
 	}
-	entries, stats := Build(sources)
+	entries, stats := Build(sources, BuildOptions{})
 
 	rate := 0.0
 	if stats.Total > 0 {