chore: make ivf fields public (#3003)

rust/lance/src/index/vector/ivf.rs

@@ -94,11 +94,12 @@ pub mod io;
 pub mod v2;
 
 /// IVF Index.
+/// WARNING: Internal API with no stability guarantees.
 pub struct IVFIndex {
     uuid: String,
 
     /// Ivf model
-    ivf: IvfModel,
+    pub ivf: IvfModel,
 
     reader: Arc<dyn Reader>,
 
@@ -107,7 +108,7 @@ pub struct IVFIndex {
 
     partition_locks: PartitionLoadLock,
 
-    metric_type: MetricType,
+    pub metric_type: MetricType,
 
     // The session cache holds an Arc to this object so we need to
     // hold a weak pointer to avoid cycles

rust/lance/src/io/exec/knn.rs

@@ -70,6 +70,8 @@ fn check_vector_column(schema: &Schema, column: &str) -> Result<()> {
 /// Preconditions:
 /// - `input` schema must contains `query.column`,
 /// - The column must be a vector column.
+///
+/// WARNING: Internal API with no stability guarantees.
 #[derive(Debug)]
 pub struct KNNVectorDistanceExec {
     /// Inner input node.
@@ -274,15 +276,15 @@ pub fn new_knn_exec(
 /// ```
 #[derive(Debug)]
 pub struct ANNIvfPartitionExec {
-    dataset: Arc<Dataset>,
+    pub dataset: Arc<Dataset>,
 
     /// The vector query to execute.
-    query: Query,
+    pub query: Query,
 
     /// The UUIDs of the indices to search.
-    index_uuids: Vec<String>,
+    pub index_uuids: Vec<String>,
 
-    properties: PlanProperties,
+    pub properties: PlanProperties,
 }
 
 impl ANNIvfPartitionExec {