Re-integrate embedder stats

crates/index-scheduler/src/scheduler/process_batch.rs

@@ -245,7 +245,11 @@ impl IndexScheduler {
                     let must_stop_processing = self.scheduler.must_stop_processing.clone();
 
                     builder
-                        .execute(&|| must_stop_processing.get(), &progress)
+                        .execute(
+                            &|| must_stop_processing.get(),
+                            &progress,
+                            current_batch.embedder_stats.clone(),
+                        )
                         .map_err(|e| Error::from_milli(e, Some(index_uid.to_string())))?;
                     index_wtxn.commit()?;
                 }