fix(api): linearize step tour migration

api/migrations/versions/2026_06_29_1200-b8c9d0e1f2a3_add_step_by_step_tour_state.py

@@ -1,7 +1,7 @@
 """add step by step tour state
 
 Revision ID: b8c9d0e1f2a3
-Revises: c3d4e5f6a7b8
+Revises: 7a1c2d9e4b60
 Create Date: 2026-06-29 12:00:00.000000
 
 """
@@ -13,7 +13,7 @@ import models
 
 # revision identifiers, used by Alembic.
 revision = "b8c9d0e1f2a3"
-down_revision = "c3d4e5f6a7b8"
+down_revision = "7a1c2d9e4b60"
 branch_labels = None
 depends_on = None