Publish curated GeoIntel source snapshot

backend/alembic/versions/202606120001_add_dataset_reference_metadata.py

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+"""Add dataset reference and provenance metadata columns."""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "202606120001"
+down_revision = "20260611212435"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("datasets", sa.Column("dataset_role", sa.Text(), nullable=False, server_default="source"))
+    op.add_column("datasets", sa.Column("source_name", sa.Text(), nullable=True))
+    op.add_column("datasets", sa.Column("reference_layer_name", sa.Text(), nullable=True))
+    op.add_column("datasets", sa.Column("source_metadata", sa.JSON(), nullable=True))
+    op.add_column("datasets", sa.Column("provenance_metadata", sa.JSON(), nullable=True))
+    op.add_column("datasets", sa.Column("imported_at", sa.DateTime(timezone=True), server_default=sa.text("NOW()"), nullable=False))
+
+
+def downgrade() -> None:
+    op.drop_column("datasets", "imported_at")
+    op.drop_column("datasets", "provenance_metadata")
+    op.drop_column("datasets", "source_metadata")
+    op.drop_column("datasets", "reference_layer_name")
+    op.drop_column("datasets", "source_name")
+    op.drop_column("datasets", "dataset_role")