Feature request: AdaptiveEmbedder Rust binding under crates/

Context

A downstream Rust-only consumer (SONA-Trader v2, ADR-002 Rust-only stack) consumes RuVector via a pinned vendor symlink. During empirical vector-tuning prep (Sprint 15.7), we walked vendor/ruvector/crates/ looking for an AdaptiveEmbedder Rust crate and found it absent.

What we found

The AdaptiveEmbedder API exists in the npm package only:

• npm/packages/ruvector/src/core/adaptive-embedder.js
• npm/packages/ruvector/src/core/adaptive-embedder.d.ts

Closest hits under crates/:

• crates/ruvector-core/src/advanced_features/matryoshka.rs — Matryoshka adaptive-dim search (different concept)
• crates/ruvllm/src/bitnet/rlm_embedder.rs — "Domain-adaptive" RLM embedder (different concept)

Ask

Expose AdaptiveEmbedder as a Rust crate under crates/ so Rust-only consumers can use it without a Node sidecar.

Current workaround

Embedding-model sweep restricted to 5 alternative candidates (fastembed bge-small, candle MiniLM-L6, OpenAI text-embedding-3-{small,large}, Voyage finance-2, Cohere embed-v3.0).

Happy to test a draft binding against a deterministic 10K-pair labeled eval-set + LHS-24 sweep we use downstream.

Start by reading npm/packages/ruvector/src/core/adaptive-embedder.js and adaptive-embedder.d.ts to define the existing API, then compare the related Rust implementations in crates/ruvector-core/src/advanced_features/matryoshka.rs and crates/ruvllm/src/bitnet/rlm_embedder.rs. Determine the appropriate crate boundary and Rust-facing API. Done means Rust-only consumers can use AdaptiveEmbedder under crates/ and the draft can be evaluated against the stated deterministic 10K-pair set and LHS-24 sweep.