The production DB was already migrated to 86cec91fdb00 (merge of
0014_add_profile_resolver_fields and 2026_06_01_add_workspaces) during
earlier fixes. The clean base branch lacked these migration files,
causing startup failure: 'Can't locate revision identified by 86cec91fdb00'.
Copy the idempotent 0013/0014 migrations and the no-op merge revision
from the fix commits so the Alembic graph matches the DB state.
Quality gates: alembic heads returns single head (86cec91fdb00),
py_compile and ruff passed on all three files.
