Merge #4446

4446: Do not omit vectors when importing a dump r=irevoire a=dureuill

# Pull Request

## Related issue
Fixes #4447 

## What does this PR do?
- Correctly populate the maps of embedders before starting the indexing operations, while importing a dump


Co-authored-by: Louis Dureuil <louis@meilisearch.com>

meilisearch/src/lib.rs

@@ -426,6 +426,9 @@ fn import_dump(
         let reader = BufReader::new(file);
         let reader = DocumentsBatchReader::from_reader(reader)?;
 
+        let embedder_configs = index.embedding_configs(&wtxn)?;
+        let embedders = index_scheduler.embedders(embedder_configs)?;
+
         let builder = milli::update::IndexDocuments::new(
             &mut wtxn,
             &index,
@@ -438,6 +441,8 @@ fn import_dump(
             || false,
         )?;
 
+        let builder = builder.with_embedders(embedders);
+
         let (builder, user_result) = builder.add_documents(reader)?;
         let user_result = user_result?;
         tracing::info!(documents_found = user_result, "{} documents found.", user_result);