fix(parents migrator): increase doc batch size to 10k (#9422)

Co-authored-by: Henry Fontanier <[email protected]>

front/migrations/20241211_parents_migrator.ts

@@ -34,7 +34,7 @@ type ProviderMigrator = {
   ) => { parents: string[]; parentId: string | null };
 };
 
-const QUERY_BATCH_SIZE = 2048;
+const QUERY_BATCH_SIZE = 10_000;
 const DOCUMENT_CONCURRENCY = 16;
 const TABLE_CONCURRENCY = 16;