refactor(bootstrap): migrate basic puzzles to seed files

Replaces GlobalsImporter's ImportPuzzleGroups/Puzzles/Missions methods (plus the
DeriveTargetPuzzleGroupId regex helper) with a dedicated PuzzleImporter that
reads three flat seed JSONs (puzzle-groups, puzzles, puzzle-missions) produced
by the Python extractor. Groups run before puzzles to satisfy the FK; missions
upsert by sequential id. Wired into Program.cs and SVSimTestFactory after
PaymentItemImporter so existing GlobalsImporterPuzzleTests continue to pass
unchanged via SeedGlobalsAsync. The original prod-capture JSONs are deleted now
that the seeds are authoritative.

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

SVSim.Bootstrap/Importers/PuzzleImporter.cs

@@ -0,0 +1,142 @@
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using SVSim.Bootstrap.Models.Seed;
+using SVSim.Database;
+using SVSim.Database.Models;
+
+namespace SVSim.Bootstrap.Importers;
+
+/// <summary>
+/// Idempotent upsert of the basic-puzzle catalog from <c>seeds/puzzle-groups.json</c>,
+/// <c>seeds/puzzles.json</c>, and <c>seeds/puzzle-missions.json</c>. Groups must be imported
+/// before puzzles (FK on <see cref="PuzzleEntry.GroupId"/> -> <see cref="PuzzleGroupEntry.Id"/>).
+/// Rows missing from the seed are LEFT INTACT (consistent with other per-importer seeds).
+/// </summary>
+public class PuzzleImporter
+{
+    public async Task<int> ImportGroupsAsync(SVSimDbContext context, string seedDir)
+    {
+        string path = Path.Combine(seedDir, "puzzle-groups.json");
+        var seed = SeedLoader.LoadList<PuzzleGroupSeed>(path);
+        if (seed.Count == 0)
+        {
+            Console.WriteLine("[PuzzleImporter] No group seed rows; skipping.");
+            return 0;
+        }
+
+        var existing = await context.PuzzleGroups.ToDictionaryAsync(e => e.Id);
+        int created = 0, updated = 0;
+
+        foreach (var s in seed)
+        {
+            if (s.Id == 0) continue;
+
+            var entry = existing.TryGetValue(s.Id, out var ex)
+                ? ex : new PuzzleGroupEntry { Id = s.Id };
+
+            entry.BasicTitleTextId = s.BasicTitleTextId;
+            entry.PuzzleCharaId = s.PuzzleCharaId;
+            entry.CharaId = s.CharaId;
+            entry.SortType = s.SortType;
+            entry.DifficultyNameListJson = s.DifficultyNameList.ValueKind == JsonValueKind.Undefined
+                ? "{}"
+                : JsonSerializer.Serialize(s.DifficultyNameList);
+
+            if (ex is null)
+            {
+                context.PuzzleGroups.Add(entry);
+                existing[s.Id] = entry;
+                created++;
+            }
+            else updated++;
+        }
+
+        await context.SaveChangesAsync();
+        Console.WriteLine($"[PuzzleImporter] Groups +{created}/~{updated}");
+        return created + updated;
+    }
+
+    public async Task<int> ImportPuzzlesAsync(SVSimDbContext context, string seedDir)
+    {
+        string path = Path.Combine(seedDir, "puzzles.json");
+        var seed = SeedLoader.LoadList<PuzzleSeed>(path);
+        if (seed.Count == 0)
+        {
+            Console.WriteLine("[PuzzleImporter] No puzzle seed rows; skipping.");
+            return 0;
+        }
+
+        var existing = await context.Puzzles.ToDictionaryAsync(e => e.Id);
+        int created = 0, updated = 0;
+
+        foreach (var s in seed)
+        {
+            if (s.Id == 0) continue;
+
+            var entry = existing.TryGetValue(s.Id, out var ex)
+                ? ex : new PuzzleEntry { Id = s.Id };
+
+            entry.GroupId = s.GroupId;
+            entry.PuzzleDifficulty = s.PuzzleDifficulty;
+            entry.IsAdditional = s.IsAdditional;
+            entry.IsPlayable = s.IsPlayable;
+            entry.ReleaseConditionTextId = s.ReleaseConditionTextId;
+
+            if (ex is null)
+            {
+                context.Puzzles.Add(entry);
+                existing[s.Id] = entry;
+                created++;
+            }
+            else updated++;
+        }
+
+        await context.SaveChangesAsync();
+        Console.WriteLine($"[PuzzleImporter] Puzzles +{created}/~{updated}");
+        return created + updated;
+    }
+
+    public async Task<int> ImportMissionsAsync(SVSimDbContext context, string seedDir)
+    {
+        string path = Path.Combine(seedDir, "puzzle-missions.json");
+        var seed = SeedLoader.LoadList<PuzzleMissionSeed>(path);
+        if (seed.Count == 0)
+        {
+            Console.WriteLine("[PuzzleImporter] No mission seed rows; skipping.");
+            return 0;
+        }
+
+        var existing = await context.PuzzleMissions.ToDictionaryAsync(e => e.Id);
+        int created = 0, updated = 0;
+
+        foreach (var s in seed)
+        {
+            if (s.Id == 0) continue;
+
+            var entry = existing.TryGetValue(s.Id, out var ex)
+                ? ex : new PuzzleMissionEntry { Id = s.Id };
+
+            entry.MissionName = s.MissionName;
+            entry.AchievedMessage = s.AchievedMessage;
+            entry.RequireNumber = s.RequireNumber;
+            entry.CampaignCommenceTime = s.CampaignCommenceTime;
+            entry.OrderId = s.OrderId;
+            entry.RewardType = s.RewardType;
+            entry.RewardDetailId = s.RewardDetailId;
+            entry.RewardNumber = s.RewardNumber;
+            entry.TargetPuzzleGroupId = s.TargetPuzzleGroupId;
+
+            if (ex is null)
+            {
+                context.PuzzleMissions.Add(entry);
+                existing[s.Id] = entry;
+                created++;
+            }
+            else updated++;
+        }
+
+        await context.SaveChangesAsync();
+        Console.WriteLine($"[PuzzleImporter] Missions +{created}/~{updated}");
+        return created + updated;
+    }
+}