Publish curated ITWorx-ModelForge source from 990401737f96c8d46a9f7b0d84994516cadcb6a0

backend/alembic/versions/20260907_0025_configuration.py

@@ -0,0 +1,46 @@
+"""Durable operator configuration and revision history.
+
+Revision ID: 20260907_0025
+Revises: 20260830_0024
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "20260907_0025"
+down_revision = "20260830_0024"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "configuration_state",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("revision", sa.Integer(), nullable=False),
+        sa.Column("overrides", sa.JSON(), nullable=False),
+        sa.CheckConstraint("id = 1"),
+        sa.CheckConstraint("revision >= 0"),
+    )
+    op.create_table(
+        "configuration_revisions",
+        sa.Column("revision", sa.Integer(), primary_key=True),
+        sa.Column("previous_revision", sa.Integer(), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("actor", sa.String(255), nullable=False),
+        sa.Column("correlation_id", sa.String(255), nullable=False),
+        sa.Column("overrides", sa.JSON(), nullable=False),
+        sa.Column("preview_digest", sa.String(64), nullable=False),
+    )
+    if op.get_bind().dialect.name == "postgresql":
+        op.execute("GRANT SELECT, INSERT, UPDATE ON configuration_state TO modelforge_runtime")
+        op.execute("REVOKE UPDATE, DELETE, TRUNCATE ON configuration_revisions FROM modelforge_runtime")
+        op.execute("GRANT SELECT, INSERT ON configuration_revisions TO modelforge_runtime")
+
+
+def downgrade() -> None:
+    if op.get_bind().execute(sa.text("SELECT count(*) FROM configuration_revisions")).scalar_one():
+        raise RuntimeError("Configuration history exists; recover the pre-migration backup instead.")
+    op.drop_table("configuration_revisions")
+    op.drop_table("configuration_state")