Auto-summon pupils to the principal after fight breaks, with a corridor FIFO queue.

src/HSchool.People/Seed.cs

@@ -21,6 +21,7 @@ public static class Seed
     public const int OrientationSalt = 13;
     public const int ConflictSalt = 14;
     public const int HomeSalt = 15;
+    public const int SummonSalt = 16;
 
     /// <summary>A stream that belongs to the school rather than to one family.</summary>
     public static int ForSchool(int schoolSeed, int salt) => Mix(schoolSeed, familyIndex: -1, salt);

src/HSchool.People/Staffing.cs

@@ -43,6 +43,8 @@ public static class Staffing
 {
     public const string TeacherPosition = "Teacher";
 
+    public const string PrincipalPosition = "Principal";
+
     public static StaffingOutcome UnknownSchool() =>
         Fail(StaffingError.UnknownSchool, new Roster([], [], []), ApplicantPool.Empty, allocated: 0, payroll: 0, attempted: 0);