models: add User.active column for soft-delete (deactivation)

Default true; server_default '1'. Lets the admin UI deactivate a user
without losing the row or the user's content (servers, blueprints,
overlays). Reactivation flips it back. Migration 0008 adds the column
via op.add_column; downgrade uses batch_alter_table per SQLite ALTER
TABLE semantics, matching the 0007 pattern.

l4d2web/alembic/versions/0008_user_active.py

@@ -0,0 +1,33 @@
+"""users.active
+
+Revision ID: 0008_user_active
+Revises: 0007_blueprint_overlay_expose_server_cfg
+Create Date: 2026-05-10
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+
+revision: str = "0008_user_active"
+down_revision: Union[str, Sequence[str], None] = "0007_blueprint_overlay_expose_server_cfg"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "users",
+        sa.Column(
+            "active",
+            sa.Boolean(),
+            nullable=False,
+            server_default=sa.text("1"),
+        ),
+    )
+
+
+def downgrade() -> None:
+    with op.batch_alter_table("users") as batch_op:
+        batch_op.drop_column("active")

l4d2web/models.py

@@ -30,6 +30,9 @@ class User(Base):
     username: Mapped[str] = mapped_column(String(64), unique=True, nullable=False)
     password_digest: Mapped[str] = mapped_column(String(255), nullable=False)
     admin: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    active: Mapped[bool] = mapped_column(
+        Boolean, default=True, nullable=False, server_default=text("1"),
+    )
     created_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)
     updated_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)