Refactor code structure for improved readability and maintainability

services/bff/alembic/env.py

@@ -0,0 +1,44 @@
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config, pool
+
+from alembic import context
+from app.core import settings
+from app.models import Base
+
+config = context.config
+config.set_main_option("sqlalchemy.url", settings.database_url)
+
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+
+def run_migrations_offline() -> None:
+    context.configure(
+        url=settings.database_url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+    with connectable.connect() as connection:
+        context.configure(connection=connection, target_metadata=target_metadata)
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

services/bff/alembic/versions/0001_initial.py

@@ -0,0 +1,36 @@
+"""initial bff schema
+
+Revision ID: 0001_initial
+Revises:
+Create Date: 2026-05-28 10:00:00.000000
+"""
+
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+from alembic import op
+
+revision: str = "0001_initial"
+down_revision: str | None = None
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "bff_users",
+        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
+        sa.Column("email", sa.String(length=320), nullable=False),
+        sa.Column("password_hash", sa.String(length=512), nullable=False),
+        sa.Column("display_name", sa.String(length=160), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+    )
+    op.create_index("ix_bff_users_email", "bff_users", ["email"], unique=True)
+
+
+def downgrade() -> None:
+    op.drop_index("ix_bff_users_email", table_name="bff_users")
+    op.drop_table("bff_users")