feat(nodejs): upgrade napi-rs from v2 to v3 (#3057)

## Summary

- Upgrades `@napi-rs/cli` from v2 to v3, `napi`/`napi-derive` Rust
crates to 3.x
- Fixes a bug
([napi-rs#1170](https://github.com/napi-rs/napi-rs/issues/1170)) where
the CLI failed to locate the built `.node` binary when a custom Cargo
target directory is set (via `config.toml`)

## Changes

**package.json / CLI**:
- `napi.name` → `napi.binaryName`, `napi.triples` → `napi.targets`
- Removed `--no-const-enum` flag and fixed output dir arg
- `napi universal` → `napi universalize`

**Rust API migration**:
- `#[napi::module_init]` → `#[napi_derive::module_init]`
- `napi::JsObject` → `Object`, `.get::<_, T>()` → `.get::<T>()`
- `ErrorStrategy` removed; `ThreadsafeFunction` now takes an explicit
`Return` type with `CalleeHandled = false` const generic
- `JsFunction` + `create_threadsafe_function` replaced by typed
`Function<Args, Return>` + `build_threadsafe_function().build()`
- `RerankerCallbacks` struct removed (`Function<'env,...>` can't be
stored in structs); `VectorQuery::rerank` now accepts the function
directly
- `ClassInstance::clone()` now returns `ClassInstance`, fixed with
explicit deref
- `Vec<u8>` in `#[napi(object)]` now maps to `Array<number>` in v3;
changed to `Buffer` to preserve the TypeScript `Buffer` type

**TypeScript**:
- `inner.rerank({ rerankHybrid: async (_, args) => ... })` →
`inner.rerank(async (args) => ...)`
- Header provider callback wrapped in `async` to match stricter typed
constructor signature

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

nodejs/src/header.rs

@@ -1,20 +1,19 @@
 // SPDX-License-Identifier: Apache-2.0
 // SPDX-FileCopyrightText: Copyright The LanceDB Authors
 
-use napi::{
-    bindgen_prelude::*,
-    threadsafe_function::{ErrorStrategy, ThreadsafeFunction},
-};
+use napi::{bindgen_prelude::*, threadsafe_function::ThreadsafeFunction};
 use napi_derive::napi;
 use std::collections::HashMap;
 use std::sync::Arc;
 
+type GetHeadersFn = ThreadsafeFunction<(), Promise<HashMap<String, String>>, (), Status, false>;
+
 /// JavaScript HeaderProvider implementation that wraps a JavaScript callback.
 /// This is the only native header provider - all header provider implementations
 /// should provide a JavaScript function that returns headers.
 #[napi]
 pub struct JsHeaderProvider {
-    get_headers_fn: Arc<ThreadsafeFunction<(), ErrorStrategy::CalleeHandled>>,
+    get_headers_fn: Arc<GetHeadersFn>,
 }
 
 impl Clone for JsHeaderProvider {
@@ -29,9 +28,12 @@ impl Clone for JsHeaderProvider {
 impl JsHeaderProvider {
     /// Create a new JsHeaderProvider from a JavaScript callback
     #[napi(constructor)]
-    pub fn new(get_headers_callback: JsFunction) -> Result<Self> {
+    pub fn new(
+        get_headers_callback: Function<(), Promise<HashMap<String, String>>>,
+    ) -> Result<Self> {
         let get_headers_fn = get_headers_callback
-            .create_threadsafe_function(0, |ctx| Ok(vec![ctx.value]))
+            .build_threadsafe_function()
+            .build()
             .map_err(|e| {
                 Error::new(
                     Status::GenericFailure,
@@ -51,7 +53,7 @@ impl lancedb::remote::HeaderProvider for JsHeaderProvider {
     async fn get_headers(&self) -> lancedb::error::Result<HashMap<String, String>> {
         // Call the JavaScript function asynchronously
         let promise: Promise<HashMap<String, String>> =
-            self.get_headers_fn.call_async(Ok(())).await.map_err(|e| {
+            self.get_headers_fn.call_async(()).await.map_err(|e| {
                 lancedb::error::Error::Runtime {
                     message: format!("Failed to call JavaScript get_headers: {}", e),
                 }