feat: allow 'all' for policy source and destination zones

backend/alembic/versions/0007_policy_zones_nullable.py

@@ -0,0 +1,23 @@
+"""make policy zone ids nullable (support 'all')
+
+Revision ID: 0007
+Revises: 0006
+Create Date: 2026-03-01
+"""
+from alembic import op
+import sqlalchemy as sa
+
+revision = "0007"
+down_revision = "0006"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.alter_column("policies", "src_zone_id", existing_type=sa.Integer(), nullable=True)
+    op.alter_column("policies", "dst_zone_id", existing_type=sa.Integer(), nullable=True)
+
+
+def downgrade() -> None:
+    op.alter_column("policies", "src_zone_id", existing_type=sa.Integer(), nullable=False)
+    op.alter_column("policies", "dst_zone_id", existing_type=sa.Integer(), nullable=False)