Normalize a raw coordinate collection. Tolerant by design — coordinates_snapshot is
an untyped jsonb[] whose at-rest contents predate v2 — so non-array input yields []
and elements without a usable numeric id are dropped rather than rendered at a
garbage position. Never throws.
Normalize a raw coordinate collection. Tolerant by design —
coordinates_snapshotis an untypedjsonb[]whose at-rest contents predate v2 — so non-array input yields[]and elements without a usable numericidare dropped rather than rendered at a garbage position. Never throws.