Add party power calculation service (#374)

Co-authored-by: Nightmerp <[email protected]>

DragaliaAPI.Database/ApiContext.cs

@@ -183,4 +183,6 @@ but EF Core doesn't like this and the client probably stops you anyway?
     public DbSet<DbSummonTicket> PlayerSummonTickets { get; set; }
 
     public DbSet<DbEmblem> Emblems { get; set; }
+
+    public DbSet<DbPartyPower> PartyPowers { get; set; }
 }

DragaliaAPI.Database/Entities/DbPartyPower.cs

@@ -0,0 +1,20 @@
+using System.ComponentModel.DataAnnotations.Schema;
+using System.ComponentModel.DataAnnotations;
+using Microsoft.EntityFrameworkCore;
+
+namespace DragaliaAPI.Database.Entities;
+
+[PrimaryKey(nameof(DeviceAccountId))]
+public class DbPartyPower : IDbHasAccountId
+{
+    /// <inheritdoc />
+    public virtual DbPlayer? Owner { get; set; }
+
+    /// <inheritdoc />
+    [ForeignKey(nameof(Owner))]
+    [Required]
+    public required string DeviceAccountId { get; set; }
+
+    [Column("MaxPartyPower")]
+    public int MaxPartyPower { get; set; }
+}

DragaliaAPI.Database/Entities/DbPlayer.cs

@@ -90,4 +90,6 @@ public class DbPlayer
         new List<DbPlayerDmodeServitorPassive>();
 
     public virtual DbPlayerShopInfo? ShopInfo { get; set; }
+
+    public virtual DbPartyPower? PartyPower { get; set; }
 }