fix(audit): Fortuna pass level, display-name persist, loadout & craft-timer queries

Audit of the emulator surface + 4 fixes:
- Fortuna pass level was frozen: nothing ever granted season XP. ClaimActiveContract
  now grants + persists FortunaPass{2,3}_SeasonXp (scaled to the contract's reputation)
  and returns the new total, so the pass level moves as you complete contracts.
- UpdateUserTitleDisplayName never persisted the rename (echoed back, lost on relog).
  Added DbUserService.UpdateDisplayNameAsync and call it.
- GetPlayerSets returned a blank loadout; now reads the persisted LOADOUT key.
- GetCraftingInProgressData was a stub; now returns the persisted CraftingTimer so an
  in-progress craft + remaining time survive a menu reopen/relog.

Remaining known gaps documented in Plane (need client data / multiplayer / out of scope).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/Prospect.Server.Api/Services/Database/DbUserService.cs

@@ -24,6 +24,14 @@ public class DbUserService : BaseDbService<PlayFabUser>
         return await Collection.Find(user => user.Id == id).FirstOrDefaultAsync();
     }
 
+    // Persist a display-name change (UpdateUserTitleDisplayName). Without this the rename
+    // is echoed back to the client but lost on next login.
+    public async Task UpdateDisplayNameAsync(string id, string displayName)
+    {
+        var update = Builders<PlayFabUser>.Update.Set(user => user.DisplayName, displayName);
+        await Collection.UpdateOneAsync(user => user.Id == id, update);
+    }
+
     private async Task<PlayFabUser> CreateAsync(PlayFabUserAuthType type, string key)
     {
         var user = new PlayFabUser