Add recess quarrels, rare yard and gym fights, and apologies.

Bullies remember a victim by a trait field, a defender can join, staff break up a fight with a reprimand, and skip empty time clears leftover clashes so they cannot last forever.

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

src/HSchool.People/Roster.cs

@@ -55,6 +55,12 @@ public sealed record Person
     /// <summary>What this person thinks of others, A→B. Sparse; zero is not stored.</summary>
     public IReadOnlyDictionary<string, int> Opinions { get; init; } = new Dictionary<string, int>(StringComparer.Ordinal);
 
+    /// <summary>
+    /// Victim a bully keeps aiming at. Cleared when they leave the roster or opinion hits the floor.
+    /// Null on everyone without a remembers-victim trait.
+    /// </summary>
+    public string? BullyVictimId { get; set; }
+
     public int AgeOn(DateTime asOf) => SchoolYears.AgeYears(BirthDate, asOf);
 }