Fix Django 6 compatibility: process_lhs() returns params as a tuple in Django 6, causing AttributeError in HashidExactLookup.as_sql(). Replaced params.extend(rhs_params) with list(params) + list(rhs_params).
Fix Django 6 compatibility: process_lhs() returns params as a tuple in Django 6, causing AttributeError in HashidExactLookup.as_sql(). Replaced params.extend(rhs_params) with list(params) + list(rhs_params).