performance-tests

@muriloschaefer

Use when authoring, scaling, or reviewing Klippel performance e2e tests — tests under `<module>/tests/<scope>/performance/` that assert time/memory/payload budgets, or anything involving large synthetic catalogs (1k/10k/100k materials), the materials seed/generator helpers, cardinality tiers, or budget-recording artifacts. Triggers include "write a perf test", "seed a large catalog", "add a cardinality tier", "10k/100k materials", "measure cold-open / sync convergence", "why is the seed slow", "add a budget assertion", and any change under `webapp/src/helpers/puppeteer/generateMaterialsCatalog.ts` / `seedSyntheticMaterials.ts`.