Complete training workflow and acceptance hardening

backend/app/db/migrations/versions/b9c6d3e2f1a0_scenario_submission_kio.py

@@ -0,0 +1,26 @@
+"""store the submitted KIO snapshot for instructor review
+
+Revision ID: b9c6d3e2f1a0
+Revises: a8b5c2d9e1f4
+Create Date: 2026-09-24
+"""
+
+import sqlalchemy as sa
+from alembic import op
+from sqlalchemy.dialects import postgresql
+
+revision = "b9c6d3e2f1a0"
+down_revision = "a8b5c2d9e1f4"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "scenario_submissions",
+        sa.Column("kio", postgresql.JSONB(astext_type=sa.Text()), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("scenario_submissions", "kio")