Unsimplify shapely geometry

[lispandfound]

Earlier, we introduced geometry simplification into the DB generation process. Ultimately, I decided this is best done later on in the pipeline (i.e. by the consumer of database data). This is because you can't unsimplify the geometry after you've already simplified it.

[lispandfound]

Actually, the simplification is required to remove some planes from the DB that have zero length. I've lowered the simplification threshold down to 1m, which should be low enough to avoid this problem but not high enough to change anything significant.

[Copilot]

Pull Request Overview

This PR removes the call to simplify geometry in the database generation pipeline so that consumers work with the full-fidelity fault trace geometries.

• Removed the simplification step from the fault trace extraction process.

Comments suppressed due to low confidence (1)

nshmdb/scripts/nshm_db_generator.py:74

• Removing the geometry simplification here means that downstream consumers must now handle full-precision fault traces. Please confirm that all consumers and tests have been updated to work with the unsimplified geometry.

fault_trace = shapely.simplify(fault_trace, 10)