Refuse domains whose fault buffer sits inside the SW4 sponge

[lispandfound]

A fault buffer too small to clear the supergrid absorbing layer puts the
source inside the region where SW4 solves a damped, coordinate-stretched
equation rather than the wave equation. The run completes and produces
waveforms; they are just not ground motion predictions. That failure has
already cost a campaign once (validation_results_24-08), and it is
cheapest to catch before a domain is written rather than after a
simulation has run.

generate-domain now checks the buffer against the sponge, using the
same workflow.sw4 geometry create-sw4-input pads with, so the two
cannot disagree.

The depth is computed before the lateral domain so the refinements can
be resolved against it -- the sponge width depends on the coarsest grid,
which depends on how deep the domain goes. This is a reordering only;
domain_max_depth does not depend on the lateral extent.

Both sw4 and refinements are optional and their absence is not an
error: the v24.2.2.x defaults are EMOD3D-only and have neither section,
so those runs skip the check entirely and are unaffected.

This is a behaviour change for SW4 realisations: a configuration that
previously produced a domain may now be rejected. That is the point.

Co-Authored-By: Claude Opus 5 noreply@anthropic.com

---

_{Stack created with GitHub Stacks CLI • Give Feedback 💬}