Function ceiling_at

nodedb/tests/bitemporal_array_retention.rs:86–95

(
    e: &ArrayEngine,
    x: i64,
    system_as_of: i64,
)

}

fn ceiling_at(
    e: &ArrayEngine,
    x: i64,
    system_as_of: i64,
) -> nodedb_array::query::ceiling::CeilingResult {
    e.store(&aid())
        .unwrap()
        .ceiling_for_coord(&[CoordValue::Int64(x)], system_as_of, None)
        .unwrap()
}

// ── Regression: cell-loss bug ─────────────────────────────────────────────────