Nullable numeric `RANGE` bounds expand to the whole partition

What happened

For a legal ascending numeric RANGE frame, a leading NULL peer group causes Dolt to use the whole partition for every row. The equivalent non-window range translation returns the correct peer and numeric-boundary results.

Environment

Dolt main (commit 92baa5e78afd013b42a62d21b05da0481031e8d0). MySQL version 8.0.43.

How to reproduce

Run the corresponding SQL in a fresh Dolt repository.

CREATE TABLE t(id INT PRIMARY KEY, k INT NULL, v INT NOT NULL);
INSERT INTO t VALUES
  (1,NULL,10),(2,NULL,20),(3,1,30),(4,2,40),(5,4,50);

SELECT id, k,
       SUM(v) OVER (
         ORDER BY k
         RANGE BETWEEN 1 PRECEDING AND CURRENT ROW
       ) AS total
FROM t
ORDER BY id;

The window-to-non-window translation is:

SELECT o.id, o.k,
       (SELECT SUM(i.v)
          FROM t AS i
         WHERE (o.k IS NULL AND i.k IS NULL)
            OR (o.k IS NOT NULL AND i.k IS NOT NULL
                AND i.k BETWEEN o.k - 1 AND o.k)) AS total
FROM t AS o
ORDER BY o.id;

For a NULL current ordering value, MySQL's numeric RANGE semantics select its NULL peers. For a non-NULL current value, the translation selects the inclusive interval [k - 1, k].

Expected Result

Both forms were run against MySQL 8.0.43 and returned:

id  k     total
1   NULL  30
2   NULL  30
3   1     30
4   2     70
5   4     50

Dolt's non-window translation returned the same rows.

Dolt actual

Dolt returned the whole-partition sum for every row:

id  k     total
1   NULL  150
2   NULL  150
3   1     150
4   2     150
5   4     150