Add database migration for crypto payment refund tracking columns

Adds refund_reason, refund_tx_hash, and refund_amount columns to the
mps_crypto_payment table to enable comprehensive tracking of refund
operations for out-of-stock scenarios and payment error handling.

make_post_sell/scripts/alembic/versions/5bbb5df5bf1b_add_refund_tracking_columns_to_crypto_.py

@@ -0,0 +1,32 @@
+"""Add refund tracking columns to crypto_payment
+
+Revision ID: 5bbb5df5bf1b
+Revises: 0f59018f6537
+Create Date: 2025-09-24 09:51:53.586990
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '5bbb5df5bf1b'
+down_revision = '0f59018f6537'
+branch_labels = None
+depends_on = None
+
+from make_post_sell.models.meta import UUIDType
+
+
+def upgrade():
+    # Add refund tracking columns to crypto_payment table
+    op.add_column('mps_crypto_payment', sa.Column('refund_reason', sa.UnicodeText(), nullable=True))
+    op.add_column('mps_crypto_payment', sa.Column('refund_tx_hash', sa.Unicode(128), nullable=True))
+    op.add_column('mps_crypto_payment', sa.Column('refund_amount', sa.BigInteger(), nullable=True))
+
+
+def downgrade():
+    # Remove refund tracking columns from crypto_payment table
+    op.drop_column('mps_crypto_payment', 'refund_amount')
+    op.drop_column('mps_crypto_payment', 'refund_tx_hash')
+    op.drop_column('mps_crypto_payment', 'refund_reason')