T263: Hall polynomials $g^\lambda_{\mu\nu}(q)$

This is the table as of 2026-09-16 08:54, by zeta3.
Run: t263-repair-20260916

table.yaml holds the numbers and everything said about them. The other
files are what was stored alongside them -- usually the code that
produced them. They are recorded, not run.

The table as it stands now: https://numberdb.org/T263
