chore: apply ruff formatting and fix whitespace issues

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

migrations/README

@@ -1 +1 @@
-Generic single-database configuration.
+Generic single-database configuration.

migrations/versions/001_file_processing_steps.py

@@ -6,7 +6,7 @@ Create Date: 2026-02-11
 
 """
 
-from typing import Sequence, Union
+from typing import Union
 
 import sqlalchemy as sa
 from alembic import op

migrations/versions/002_add_file_paths.py

@@ -6,7 +6,7 @@ Create Date: 2026-02-11
 
 """
 
-from typing import Sequence, Union
+from typing import Union
 
 import sqlalchemy as sa
 from alembic import op

migrations/versions/003_add_deduplication_support.py

@@ -6,7 +6,7 @@ Create Date: 2026-02-12
 
 """
 
-from typing import Sequence, Union
+from typing import Union
 
 import sqlalchemy as sa
 from alembic import op
@@ -21,13 +21,13 @@ def upgrade() -> None:
     """Add is_duplicate and duplicate_of_id columns to files table."""
     # Add is_duplicate column with default False
     op.add_column("files", sa.Column("is_duplicate", sa.Boolean(), nullable=False, server_default="0"))
-    
+
     # Add duplicate_of_id column as foreign key to self
     op.add_column("files", sa.Column("duplicate_of_id", sa.Integer(), nullable=True))
-    
+
     # Create index on is_duplicate for efficient filtering
     op.create_index("ix_files_is_duplicate", "files", ["is_duplicate"])
-    
+
     # Create foreign key relationship
     op.create_foreign_key("fk_files_duplicate_of_id", "files", "files", ["duplicate_of_id"], ["id"])
 
@@ -36,10 +36,10 @@ def downgrade() -> None:
     """Remove is_duplicate and duplicate_of_id columns from files table."""
     # Drop foreign key
     op.drop_constraint("fk_files_duplicate_of_id", "files", type_="foreignkey")
-    
+
     # Drop index
     op.drop_index("ix_files_is_duplicate", table_name="files")
-    
+
     # Drop columns
     op.drop_column("files", "duplicate_of_id")
     op.drop_column("files", "is_duplicate")