Module persist 

R-tree checkpoint/restore for durable persistence.

Follows the same pattern as the vector engine’s HNSW checkpoint: serialize all entries to bytes (MessagePack) → write to storage → restore via bulk_load on cold start.

Storage key scheme (in redb under Namespace::Spatial):

• {collection}\x00{field}\x00rtree → serialized R-tree entries
• {collection}\x00{field}\x00meta → SpatialIndexMeta

Structs

RTreeSnapshot

Serialized R-tree snapshot (legacy MessagePack).

SpatialIndexMeta

Metadata for a persisted spatial index.

Enums

RTreeCheckpointError

Errors during R-tree checkpoint operations.

SpatialIndexType

Type of spatial index.

Functions

deserialize_meta

Deserialize index metadata from bytes.

meta_storage_key

Build the storage key for spatial index metadata.

rtree_storage_key

Build the storage key for an R-tree checkpoint.

serialize_meta

Serialize index metadata to bytes.