Function encode_coord_key

nodedb-array/src/query/retention.rs:48–53

Encode a coordinate vector into a stable byte key for HashMap / HashSet use. Uses the same zerompk encoding as the write path so keys are comparable across tile-versions.

(coord: &[CoordValue])

/// Uses the same zerompk encoding as the write path so keys are comparable
/// across tile-versions.
pub fn encode_coord_key(coord: &[CoordValue]) -> ArrayResult<Vec<u8>> {
    let owned = coord.to_vec();
    zerompk::to_msgpack_vec(&owned).map_err(|e| ArrayError::SegmentCorruption {
        detail: format!("encode_coord_key: {e}"),
    })
}

// ── Row iteration helper ─────────────────────────────────────────────────────