Give each school its own people seed so composition no longer follows create order.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/HSchool.AppHost.Tests/GoldenSaveTests.cs

@@ -16,6 +16,7 @@ public class GoldenSaveTests(AppHostFixture fixture)
         var state = await SchoolApiTests.GetSchoolsAsync(client);
         var school = Assert.Single(state.Schools);
         Assert.Equal(1, school.Id);
+        Assert.Equal(1, school.Seed);
         Assert.Equal("Золотая", school.Name);
         Assert.Equal(new DateTime(2012, 3, 31, 6, 0, 0, DateTimeKind.Utc), school.GameTime);
         Assert.False(school.Running);
@@ -34,6 +35,8 @@ public class GoldenSaveTests(AppHostFixture fixture)
 
         var state = await SchoolApiTests.GetSchoolsAsync(client);
         var school = Assert.Single(state.Schools);
+        Assert.Equal(1, school.Id);
+        Assert.Equal(1, school.Seed);
         Assert.Equal("Золотая", school.Name);
 
         var people = await PeopleAsync(client, school.Id);