2: Use tuples for all AST collection fields (instead of lists) #251

Performance Gate Passed

✅ 14 untouched benchmarks
🆕 4 new benchmarks

	Benchmark	`BASE`	`HEAD`	Efficiency
🆕	`test_pickle_large_query_encode`	N/A	110.8 ms	N/A
🆕	`test_pickle_large_query_roundtrip`	N/A	318.6 ms	N/A
🆕	`test_parse_large_query`	N/A	418 ms	N/A
🆕	`test_pickle_large_query_decode`	N/A	207.8 ms	N/A

_{Comparing corydolphin:use-tuples-for-all-ast (83c2dd6) with main (283d002)}