feat: split RU-ARK into mainland + New Earth + Severnaya Zemlya — idempotent stage, manifests 1,798 (v0.25.0, #31)

public/region-adjacency.json

@@ -887,6 +887,7 @@
     "komi-eoeh",
     "murmansk-etas",
     "nenets-qyga",
+    "severnaya-zemlya-awqp",
     "vologda-ynvr"
   ],
   "artigas-stkw": [
@@ -7614,6 +7615,7 @@
     "ontario-bzqu",
     "quebec-yegk"
   ],
+  "new-earth-eikt": [],
   "new-hampshire-koki": [
     "maine-maiz",
     "massachusetts-ggid",
@@ -10010,6 +10012,9 @@
     "medea-elbf",
     "skikda-odba"
   ],
+  "severnaya-zemlya-awqp": [
+    "arkhangel-sk-lhbk"
+  ],
   "sevilla-oxma": [
     "badajoz-ciwt",
     "cadiz-aazc",

public/region-keys.json

@@ -1305,6 +1305,8 @@
   "RU-ALT": "altay-mfuq",
   "RU-AMU": "amur-clbp",
   "RU-ARK": "arkhangel-sk-lhbk",
+  "RU-ARK-NE": "new-earth-eikt",
+  "RU-ARK-SZ": "severnaya-zemlya-awqp",
   "RU-AST": "astrakhan-anec",
   "RU-BA": "bashkortostan-uovk",
   "RU-BEL": "belgorod-wxjk",