d9d29fbfea
Two unrelated feature sets landed on the same dev branch this session: 1. Progression import/export (7 prior commits): owned cards + items + decks + tolerant numeric my_rotation_id parsing + literal-client-JSON wire-shape coverage. 2. Pack system rewrite (7 new commits): full-fidelity per-pack draw tables seeded from the 279 archived drawrates CSVs, replacing the pack->CardSet pool assumption. New EF entities, importer, sampler, IsEnabled admin gate on PackConfig, statistical sampler test, PackRateConfig marked Obsolete. Tests: 648/648 green. Bootstrap end-to-end: 279 PackDrawConfigs / 1973 SlotRates / 90800 CardWeights / 35 enabled + 244 disabled stubs in Packs.