fix(postgresql): return raw column in SQL_BUILD_SELECT_COLS_BY_PK_FMT instead of the encoded value

This query is used during merge conflict resolution to compare local values against incoming changes. Returning encoded bytea caused type mismatches and order-dependent winners in multi-db tests, failing 03_3db_multiple_roundtrip.sql.

Author: andinux

src/postgresql/sql_postgresql.c

@@ -262,9 +262,7 @@ const char * const SQL_BUILD_SELECT_COLS_BY_PK_FMT =
     "  SELECT '%s'::text AS colname"
     ") "
     "SELECT "
-    "  'SELECT cloudsync_encode_value(' || "
-    "       (SELECT format('%%I', colname) FROM col) || "
-    "       ')' "
+    "  'SELECT ' || (SELECT format('%%I', colname) FROM col) "
     "  || ' FROM ' || (SELECT tblreg::text FROM tbl)"
     "  || ' WHERE '"
     "  || (SELECT string_agg(format('%%I=$%%s', attname, ord), ' AND ' ORDER BY ord) FROM pk)"