sqlparse raises SQLParseError above MAX_GROUPING_TOKENS=10000 tokens
(~25KB of typical SQL). The try/except fallback already handled it, but paid
~1s per oversized SQL for a parse doomed to fail. Add _SQLPARSE_SKIP_THRESHOLD
(30k chars) to bypass sqlparse for oversized text (~15x faster, 1.2s->0.08s for
a 212KB SQL) while keeping literal filtering for SQL under the threshold.
Tests: oversized-SQL skip-threshold behavior.
busya
4d282b43e2