Depends on #6862

Summary

• Eliminates the temporary DirectIntList used when building symbol rank maps. Replaces it with in-place permutation inversion after quicksort, reducing extra space from O(N) to O(1) (N = symbol count). Mainly benefits high-cardinality symbol columns.
• Replaces string comparison (getSym() + Chars.compare) with rank-based comparison (getInt() + rank map lookup) when sorting SYMBOL columns that have static symbol tables. At cursor open, a rank map maps each symbol key to its alphabetical rank; the comparator then compares ranks instead of strings.
• Applies the optimization to all comparator-based sort paths: tree-based sort cursors, top-K cursors, window function tree comparators (CachedWindowRecordCursorFactory), and window function internal comparators (rank(), percent_rank()).
• Non-static symbol columns (e.g. CAST(str AS SYMBOL)) fall back to the original getSym() + Chars.compare path.

Benchmark

R-B tree sort path (ORDER BY includes a STRING column, so encoded sort is not used):

SELECT *, 'ab' FROM fx_trades t
WHERE t.timestamp IN '$now-130h..$now'
ORDER BY t.symbol, t.ecn, t.counterparty, t.passive, 'ab';

7,235,498 rows: