feat(missions): MissionCatalogImporter, idempotent upsert by id

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

SVSim.Bootstrap/Importers/MissionCatalogImporter.cs

@@ -0,0 +1,57 @@
+using Microsoft.EntityFrameworkCore;
+using SVSim.Bootstrap.Models.Seed;
+using SVSim.Database;
+using SVSim.Database.Models;
+
+namespace SVSim.Bootstrap.Importers;
+
+/// <summary>
+/// Idempotent upsert of mission catalog rows from <c>seeds/mission-catalog.json</c>.
+/// Rows missing from the seed are LEFT INTACT (so hand-added catalog rows survive).
+/// </summary>
+public class MissionCatalogImporter
+{
+    public async Task<int> ImportAsync(SVSimDbContext context, string seedDir)
+    {
+        var seed = SeedLoader.LoadList<MissionCatalogSeed>(Path.Combine(seedDir, "mission-catalog.json"));
+        if (seed.Count == 0)
+        {
+            Console.WriteLine("[MissionCatalogImporter] No seed rows; skipping.");
+            return 0;
+        }
+
+        var existing = await context.MissionCatalog.ToDictionaryAsync(e => e.Id);
+        int created = 0, updated = 0;
+        var unmapped = new List<int>();
+        foreach (var s in seed)
+        {
+            if (s.Id == 0) continue;
+            var entry = existing.TryGetValue(s.Id, out var ex) ? ex : new MissionCatalogEntry { Id = s.Id };
+            entry.Name = s.Name;
+            entry.LotType = s.LotType;
+            entry.RequireNumber = s.RequireNumber;
+            entry.RewardType = s.RewardType;
+            entry.RewardDetailId = s.RewardDetailId;
+            entry.RewardNumber = s.RewardNumber;
+            entry.BattlePassPoint = s.BattlePassPoint;
+            entry.DefaultFlag = s.DefaultFlag;
+            entry.EventType = s.EventType;
+            entry.EventArg = s.EventArg;
+            entry.StartTime = s.StartTime;
+            entry.EndTime = s.EndTime;
+            if (ex is null) { context.MissionCatalog.Add(entry); existing[s.Id] = entry; created++; }
+            else updated++;
+            if (s.EventType is null) unmapped.Add(s.Id);
+        }
+
+        await context.SaveChangesAsync();
+        Console.WriteLine($"[MissionCatalogImporter] +{created}/~{updated}");
+        if (unmapped.Count > 0)
+        {
+            Console.WriteLine($"[MissionCatalogImporter] WARN: {unmapped.Count} mission_ids with " +
+                              $"no event_type: [{string.Join(", ", unmapped)}] — add to MISSION_EVENT_MAP " +
+                              "in data_dumps/extract/extract-missions.py and re-run the extractor");
+        }
+        return created + updated;
+    }
+}

SVSim.Bootstrap/Models/Seed/MissionCatalogSeed.cs

@@ -0,0 +1,21 @@
+using System.Text.Json.Serialization;
+
+namespace SVSim.Bootstrap.Models.Seed;
+
+/// <summary>Mirrors a single entry in <c>seeds/mission-catalog.json</c>.</summary>
+public sealed class MissionCatalogSeed
+{
+    [JsonPropertyName("id")] public int Id { get; set; }
+    [JsonPropertyName("name")] public string Name { get; set; } = "";
+    [JsonPropertyName("lot_type")] public int LotType { get; set; }
+    [JsonPropertyName("require_number")] public int RequireNumber { get; set; }
+    [JsonPropertyName("reward_type")] public int RewardType { get; set; }
+    [JsonPropertyName("reward_detail_id")] public long RewardDetailId { get; set; }
+    [JsonPropertyName("reward_number")] public int RewardNumber { get; set; }
+    [JsonPropertyName("battle_pass_point")] public int BattlePassPoint { get; set; }
+    [JsonPropertyName("default_flag")] public bool DefaultFlag { get; set; }
+    [JsonPropertyName("event_type")] public string? EventType { get; set; }
+    [JsonPropertyName("event_arg")] public int? EventArg { get; set; }
+    [JsonPropertyName("start_time")] public long StartTime { get; set; }
+    [JsonPropertyName("end_time")] public long? EndTime { get; set; }
+}