GT2026 fully worked example revision 6

The result presentation contains three Alternative 2 figures: SSB, catch and
projected fishing mortality (F). All use salmon 90% projection ribbons. SSB
and catch use logarithmic y-axes. SSB shows dashed B40 and B35 reference lines;
F uses a linear y-axis in year^-1 with dashed F40 and F35 lines read from the
saved run. The portable entry script uses the shared report plot helper and
exports these three PNGs plus the existing two CSV tables, now including F.

Revision 5 added the catch logarithmic y-axis. Revision 4 introduced the fully
worked example presentation. Revision 3 added the spawning-month guard.
Revision 2 made plain rendering select the audit by default, with saved
results selected explicitly.

No model inputs, saved output or scientific assumptions were changed during
this presentation revision. Earlier saved attempt evidence is preserved.
See VALIDATION.md for historical checks and the current validation record.
