feat(packs): wire PackDrawTableImporter; retire ICardPoolProvider

Bootstrap Program.cs now calls PackDrawTableImporter after PackImporter.
Delete DbCardPoolProvider, ICardPoolProvider, and the DbCardPoolProvider
tests — the new IPackDrawTableRepository covers what GachaPointService
needed (legendary-tier card_ids per pack) and PackOpenService takes the
draw table directly.

GachaPointService now resolves the legendary catalog from
PackDrawTable.CardWeights filtered by Tier==Legendary, instead of
ICardPoolProvider.GetPool then a rarity filter. Same end set, no DB pool
walk.

Test fallout: tests that fabricate custom card sets for gacha-point
tests now call factory.SeedPackDrawTableFromSetAsync(packId, setId)
to install a matching legendary-tier stub. Full suite: 647/647 green.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.EmulatedEntrypoint/Program.cs

@@ -80,7 +80,6 @@ public class Program
         // pitfall. Cost: one indexed single-row query per section per request — trivial. No
         // in-process cache today; the IGameConfigService interface is shaped to allow one later.
         builder.Services.AddScoped<SVSim.Database.Services.IGameConfigService, GameConfigService>();
-        builder.Services.AddScoped<ICardPoolProvider, DbCardPoolProvider>();
         builder.Services.AddScoped<ICardFoilLookup, DbCardFoilLookup>();
         builder.Services.AddScoped<PackOpenService>();
         builder.Services.AddScoped<IGachaPointService, GachaPointService>();