Fix ruff: add BedBatchResult to top-level imports

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: sanghoonio

bbconf/modules/bedfiles.py

@@ -45,6 +45,7 @@
     UniverseNotFoundError,
 )
 from bbconf.models.bed_models import (
+    BedBatchResult,
     BedClassification,
     BedEmbeddingResult,
     BedFiles,
@@ -253,8 +254,6 @@ def get_batch(
         :param distributions: if True, include distribution arrays in stats
         :return: BedListResult with matching records
         """
-        from bbconf.models.bed_models import BedBatchResult, BedMetadataAll
-
         statement = select(Bed).where(Bed.id.in_(identifiers))
 
         with Session(self._sa_engine) as session: