feat: add boards and tasks management endpoints

backend/alembic/script.py.mako

@@ -5,24 +5,22 @@ Revises: ${down_revision | comma,n}
 Create Date: ${create_date}
 
 """
-from typing import Sequence, Union
+from __future__ import annotations
 
 from alembic import op
 import sqlalchemy as sa
-${imports if imports else ""}
+
 
 # revision identifiers, used by Alembic.
-revision: str = ${repr(up_revision)}
-down_revision: Union[str, Sequence[str], None] = ${repr(down_revision)}
-branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
-depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
 
 
 def upgrade() -> None:
-    """Upgrade schema."""
     ${upgrades if upgrades else "pass"}
 
 
 def downgrade() -> None:
-    """Downgrade schema."""
     ${downgrades if downgrades else "pass"}