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

dev/config.llm.json

@@ -2,7 +2,13 @@
   "addr": "127.0.0.1:6172",
   "data_path": "dev/registry.db",
   "log_level": "warn",
+  "cities": [
+    {
+      "name": "Новосибирск",
+      "aliases": ["нск", "новосиб", "новосибирская область", "нсо"]
+    }
+  ],
+  "default_city": "Новосибирск",
   "resolve": { "fuzzy_threshold": 0.82, "ambiguity_margin": 0.06, "max_candidates": 5 },
-  "portal": { "url": "https://map.novo-sibirsk.ru/elitegis/rest/services/maps/disconnections/MapServer/101/query", "timeout_seconds": 2, "retries": 0 },
   "llm": { "enabled": true, "url": "http://127.0.0.1:6193", "token": "EMPTY", "model": "qwen3-14b-awq", "timeout_seconds": 5, "max_tokens": 512, "disable_thinking": true }
 }