Merge pull request #1400 from rapidsai/branch-25.10

Forward-merge branch-25.10 into branch-25.12

Author: GPUtester

docs/source/c_api/neighbors.rst

@@ -16,3 +16,4 @@ Nearest Neighbors
    neighbors_hnsw_c.rst
    neighbors_mg.rst
    neighbors_all_neighbors_c.rst
+   neighbors_vamana_c.rst