little update

alembic/versions/20260812_01_create_network_pool.py

@@ -0,0 +1,32 @@
+"""create network pool
+
+Revision ID: 20260812_01
+Revises:
+Create Date: 2026-08-12
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+revision = "20260812_01"
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "network_pool",
+        sa.Column("cidr", sa.String(length=18), nullable=False),
+        sa.Column("cloud_subnet_id", sa.String(length=64), nullable=False),
+        sa.Column("game_id", sa.Uuid(), nullable=True),
+        sa.Column("allocated_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("CURRENT_TIMESTAMP"), nullable=False),
+        sa.PrimaryKeyConstraint("cidr"),
+        sa.UniqueConstraint("cloud_subnet_id"),
+        sa.UniqueConstraint("game_id"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("network_pool")