Add auth foundation and app DB management

alembic_app/env.py

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+from logging.config import fileConfig
+
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+
+from app.auth_db import AuthBase
+from app.config import get_settings
+from app.models.auth import AuthSession, AuthUser  # noqa: F401
+
+config = context.config
+
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+settings = get_settings()
+configured_url = config.get_main_option("sqlalchemy.url")
+if not configured_url or configured_url == "sqlite:///./data/app.db":
+    config.set_main_option("sqlalchemy.url", settings.app_database_url)
+
+target_metadata = AuthBase.metadata
+
+
+def run_migrations_offline() -> None:
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(url=url, target_metadata=target_metadata, literal_binds=True)
+
+    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()

alembic_app/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[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)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

alembic_app/versions/20260420_03_app_auth_baseline.py

@@ -0,0 +1,56 @@
+"""app auth baseline
+
+Revision ID: 20260420_03_app_auth_baseline
+Revises:
+Create Date: 2026-04-20 00:00:00.000000
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision: str = "20260420_03_app_auth_baseline"
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "auth_users",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("username", sa.String(length=255), nullable=False),
+        sa.Column("password_hash", sa.String(length=255), nullable=False),
+        sa.Column("is_active", sa.Boolean(), nullable=False),
+        sa.Column("force_password_change", sa.Boolean(), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(op.f("ix_auth_users_username"), "auth_users", ["username"], unique=True)
+
+    op.create_table(
+        "auth_sessions",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("user_id", sa.Integer(), nullable=False),
+        sa.Column("token_hash", sa.String(length=64), nullable=False),
+        sa.Column("csrf_token", sa.String(length=128), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("revoked_at", sa.DateTime(timezone=True), nullable=True),
+        sa.ForeignKeyConstraint(["user_id"], ["auth_users.id"]),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(op.f("ix_auth_sessions_expires_at"), "auth_sessions", ["expires_at"], unique=False)
+    op.create_index(op.f("ix_auth_sessions_token_hash"), "auth_sessions", ["token_hash"], unique=True)
+    op.create_index(op.f("ix_auth_sessions_user_id"), "auth_sessions", ["user_id"], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index(op.f("ix_auth_sessions_user_id"), table_name="auth_sessions")
+    op.drop_index(op.f("ix_auth_sessions_token_hash"), table_name="auth_sessions")
+    op.drop_index(op.f("ix_auth_sessions_expires_at"), table_name="auth_sessions")
+    op.drop_table("auth_sessions")
+    op.drop_index(op.f("ix_auth_users_username"), table_name="auth_users")
+    op.drop_table("auth_users")