CI / build + unit + e2e (pull_request) Successful in 2m34s
#41: re-partition the RU-ARK mainland's 28-part lat>=68 Arctic-coast band into two new regions via a new turf-free, idempotent pipeline stage scripts/split-arkhangel-band.mjs (npm run split:regions:band), mirroring the #31 split: - RU-PEO (Pechora, 13 parts, ~37,678 km2) -> key pechora-qwhs - RU-YAM (Yamal, 15 parts, ~51,722 km2) -> key yamal-gosw - RU-ARK keeps its id/name/key arkhangel-sk-lhbk (ownership-safe); the 5-part lat<68 core (~305,229 km2) stays RU-ARK. Pure re-partition: no geometry moved (byte-identical union). The two new features are inserted immediately after RU-ARK-SZ. Manifests regenerated with the real scripts (1,798 -> 1,800 keys + adjacency; adjacency pairs 4,471 -> 4,473). Fixed-point dataset unchanged except feature count (11,794 parts / 11,795 rings / 164,801 verts / 1 KZ-KZY hole). Four dataset/manifest tests updated (RUS 82 -> 84 sub-regions). Version 0.25.0 -> 0.26.0. Fixes #41