diff --git a/backend/alembic/versions/a9b8c7d6e5f4_project_summary.py b/backend/alembic/versions/a9b8c7d6e5f4_project_summary.py
index 2e105ce..99ef857 100644
--- a/backend/alembic/versions/a9b8c7d6e5f4_project_summary.py
+++ b/backend/alembic/versions/a9b8c7d6e5f4_project_summary.py
@@ -12,6 +12,7 @@
 from collections.abc import Sequence
 
 import sqlalchemy as sa
+
 from alembic import op
 
 revision: str = "a9b8c7d6e5f4"
@@ -29,4 +30,4 @@
 
 
 def downgrade() -> None:
-    op.drop_column("projects", "summary")
\ No newline at end of file
+    op.drop_column("projects", "summary")
diff --git a/backend/alembic/versions/e7f8a9b0c1d2_coin_event_uniques.py b/backend/alembic/versions/e7f8a9b0c1d2_coin_event_uniques.py
index f0ac6fc..a6cc2ee 100644
--- a/backend/alembic/versions/e7f8a9b0c1d2_coin_event_uniques.py
+++ b/backend/alembic/versions/e7f8a9b0c1d2_coin_event_uniques.py
@@ -45,4 +45,4 @@
 def downgrade() -> None:
     op.drop_index("uq_coin_level", table_name="coin_events")
     op.drop_index("uq_coin_daily", table_name="coin_events")
-    op.drop_column("coin_events", "day")
\ No newline at end of file
+    op.drop_column("coin_events", "day")
diff --git a/backend/alembic/versions/f1a2b3c4d5e6_user_name.py b/backend/alembic/versions/f1a2b3c4d5e6_user_name.py
index 06b6dc2..ed4e9e2 100644
--- a/backend/alembic/versions/f1a2b3c4d5e6_user_name.py
+++ b/backend/alembic/versions/f1a2b3c4d5e6_user_name.py
@@ -7,6 +7,7 @@
 """
 
 import sqlalchemy as sa
+
 from alembic import op
 
 revision = "f1a2b3c4d5e6"
@@ -20,4 +21,4 @@
 
 
 def downgrade() -> None:
-    op.drop_column("users", "name")
\ No newline at end of file
+    op.drop_column("users", "name")
diff --git a/backend/alembic/versions/f9a0b1c2d3e4_mcp_users_multitenancy.py b/backend/alembic/versions/f9a0b1c2d3e4_mcp_users_multitenancy.py
index 067e0f6..91aeb66 100644
--- a/backend/alembic/versions/f9a0b1c2d3e4_mcp_users_multitenancy.py
+++ b/backend/alembic/versions/f9a0b1c2d3e4_mcp_users_multitenancy.py
@@ -19,6 +19,7 @@
 from collections.abc import Sequence
 
 import sqlalchemy as sa
+
 from alembic import op
 
 revision: str = "f9a0b1c2d3e4"
@@ -50,7 +51,9 @@
     op.create_table(
         "mcp_tokens",
         sa.Column("id", sa.Integer(), primary_key=True),
-        sa.Column("user_id", sa.String(64), sa.ForeignKey("users.id", ondelete="CASCADE"), nullable=False),
+        sa.Column(
+            "user_id", sa.String(64), sa.ForeignKey("users.id", ondelete="CASCADE"), nullable=False
+        ),
         sa.Column("token_hash", sa.String(64), nullable=False, unique=True),
         sa.Column("label", sa.String(100), nullable=False, server_default=""),
         sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
@@ -127,4 +130,4 @@
         op.drop_index(f"ix_{table}_user_id", table_name=table)
         op.drop_column(table, "user_id")
     op.drop_table("mcp_tokens")
-    op.drop_table("users")
\ No newline at end of file
+    op.drop_table("users")