Добавил слой Infrastructure

backend/UniVerse.Infrastructure/Data/Configurations/AchievementConfiguration.cs

@@ -0,0 +1,23 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using UniVerse.Domain.Entities;
+
+namespace UniVerse.Infrastructure.Data.Configurations;
+
+public class AchievementConfiguration : IEntityTypeConfiguration<Achievement>
+{
+    public void Configure(EntityTypeBuilder<Achievement> builder)
+    {
+        builder.ToTable("achievements");
+
+        builder.HasKey(a => a.Id);
+        builder.Property(a => a.Id).HasColumnName("id");
+        builder.Property(a => a.Name).HasColumnName("name").HasMaxLength(255).IsRequired();
+        builder.Property(a => a.Description).HasColumnName("description");
+        builder.Property(a => a.IconUrl).HasColumnName("icon_url").HasMaxLength(500);
+        builder.Property(a => a.XpReward).HasColumnName("xp_reward").HasDefaultValue(0);
+        builder.Property(a => a.CoinReward).HasColumnName("coin_reward").HasDefaultValue(0);
+        builder.Property(a => a.Condition).HasColumnName("condition");
+        builder.Property(a => a.CreatedAt).HasColumnName("created_at").HasDefaultValueSql("NOW()");
+    }
+}