chore: DB 스키마 문서 동기화 + Admin EF 설정 보완 (#72)

Reviewed-on: https://git.ipstein.myds.me/SPMS/SPMS_API/pulls/73

SPMS.Infrastructure/Persistence/Configurations/AdminConfiguration.cs

@@ -27,6 +27,8 @@ public class AdminConfiguration : IEntityTypeConfiguration<Admin>
         builder.Property(e => e.EmailVerifiedAt);
         builder.Property(e => e.CreatedAt).IsRequired();
         builder.Property(e => e.LastLoginAt);
+        builder.Property(e => e.RefreshToken).HasMaxLength(255);
+        builder.Property(e => e.RefreshTokenExpiresAt);
         builder.Property(e => e.IsDeleted).HasColumnType("tinyint(1)").IsRequired().HasDefaultValue(false);
         builder.Property(e => e.DeletedAt);