bugfix: schemas/util.sql: raise(): need to use $__BODY1$ in case msg contains $BODY1$ (in SQL)

bugfix: schemas/util.sql: mk_out_params(): need COALESCE around string_agg()

bugfix: schemas/util.sql: eval(): don't declare it STRICT because it should throw an error if you try to execute NULL

schemas/vegbien.sql: synced with DB, which reorders ~type tables

schemas/util.sql: added mk_out_params()

schemas/util.sql: mk_diff_query(): indented left_ table to line up vertically with right_, for easier comparison of the left_/right_ table names

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: diff(text, text): handle the CROSS JOIN special case using `FULL JOIN ON true`, to allow mk_diff_query() to support just a straighforward FULL JOIN. this also ensures that all diff queries use the same FULL JOIN template.

bugfix: schemas/vegbien.sql: public_validations: schema comment: also need to re-create keys() functions after running public_validations.rm_all_queries()

bugfix: schemas/vegbien.sql: added back keys() matchup functions, which get cascadingly deleted when the queries are re-created to change column names, etc. note that this causes the associated ~type tables to sort before them.