Complete phase 47 romance pack on generic orientation and affinity hooks.

Vanilla catalogs stay without crushes; a content pack ships the overlay so later mods can reuse it.

src/HSchool.People/Roster.cs

@@ -55,9 +55,30 @@ 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>
+    /// OrientationDef name. Null when the catalog has no orientations (vanilla). Omitted from JSON.
+    /// </summary>
+    public string? Orientation { get; init; }
+
+    /// <summary>Crushes and the one pair. Null without an orientation pack. Mutable overlay.</summary>
+    public PersonBonds? Bonds { get; set; }
+
     public int AgeOn(DateTime asOf) => SchoolYears.AgeYears(BirthDate, asOf);
 }
 
+/// <summary>
+/// One-way crushes and at most one pair. Lives on the person when a pack shipped orientations.
+/// Mutated in place the same way opinions are.
+/// </summary>
+public sealed class PersonBonds
+{
+    public List<string> Crushes { get; set; } = [];
+
+    public string? PartnerId { get; set; }
+
+    public DateTime? PairEndedOn { get; set; }
+}
+
 public sealed record PersonName(
     string Given,
     string Surname,