schemas/util.sql: mk_diff_query(): removed special handling for CROSS JOIN because this is now handled by diff(text, text) using `FULL JOIN ON true`. this simplification allows mk_diff_query() to contain just the template structure of the FULL JOIN, without _if() calls that decrease readability.
schemas/util.sql: mk_diff_query(): removed special handling for CROSS JOIN because this is now handled by diff(text, text) using `FULL JOIN ON true`. this simplification allows mk_diff_query() to contain just the template structure of the FULL JOIN, without _if() calls that decrease readability.