feat: return typed refresh job results (#4013)

## Problem

`refresh_column_async` returned a unit-result job even though durable
refresh jobs carry a canonical terminal result. Python callers could not
obtain row counts or source and published versions through the public
`Job` API, and local and remote refresh jobs exposed different result
semantics.

## Behavior

`refresh_column_async` now returns `Job[RefreshColumnResult]` for local
and remote tables. The general typed-job bridge binds each endpoint to
its public result model while preserving unit-result jobs and existing
status, wait, cancel, and timeout behavior. A local no-op refresh
reports no published version.

The Node.js API continues to resolve `wait()` as `void`; its binding
erases the Rust result type internally to preserve the existing public
contract.

## Ownership and integration boundary

LanceDB owns the language-neutral `Job<T>` contract and language-binding
decode. Sophon owns production and durable persistence of terminal
payloads. Sophon #7348 and #7378 now publish the canonical refresh
result for Function-backed and expression-backed refresh jobs,
respectively. The remote client fixture matches the merged server
schema; live deployment and end-to-end demo acceptance remain separate
rollout checks.

nodejs/src/job.rs

@@ -14,9 +14,12 @@ pub struct Job {
 }
 
 impl Job {
-    pub(crate) fn new(inner: lancedb::Job) -> Self {
+    pub(crate) fn new<T>(inner: lancedb::Job<T>) -> Self
+    where
+        T: Clone + Send + Sync + 'static,
+    {
         Self {
-            inner: Arc::new(inner),
+            inner: Arc::new(inner.map(|_| ())),
         }
     }
 }