Initial commit: Theriapolis baseline at port/godot branch point

Captures the pre-Godot-port state of the codebase. This is the rollback
anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md).
All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Theriapolis.Core/Data/BiasProfileDef.cs

@@ -0,0 +1,44 @@
+using System.Text.Json.Serialization;
+
+namespace Theriapolis.Core.Data;
+
+/// <summary>
+/// Phase 6 M1 — pre-meeting prejudice template per
+/// <c>theriapolis-rpg-reputation.md §I-1</c>. Each NPC carries a
+/// <c>BiasProfileId</c> that points at one of these; the runtime
+/// disposition formula adds <see cref="CladeBias"/>[pc.clade] (plus the
+/// universal size-differential modifier) to the personal/faction
+/// components when computing how an NPC reacts to the player.
+///
+/// 12 profiles ship with the game: pack-loyal Canid traditionalists,
+/// herd-cautious Cervids, urban progressives, hybrid survivors, etc.
+/// Adding new profiles is a content-only edit.
+/// </summary>
+public sealed record BiasProfileDef
+{
+    [JsonPropertyName("id")]
+    public string Id { get; init; } = "";
+
+    [JsonPropertyName("name")]
+    public string Name { get; init; } = "";
+
+    [JsonPropertyName("description")]
+    public string Description { get; init; } = "";
+
+    /// <summary>Modifier for the player's clade. Keys are clade ids ("canidae", "felidae", ...).</summary>
+    [JsonPropertyName("clade_bias")]
+    public Dictionary<string, int> CladeBias { get; init; } = new();
+
+    /// <summary>Modifier when the player is detected as hybrid. Negative = stigma, positive = solidarity.</summary>
+    [JsonPropertyName("hybrid_bias")]
+    public int HybridBias { get; init; } = 0;
+
+    /// <summary>
+    /// Optional faction-affinity hints. Map of faction id → +integer (faction
+    /// the NPC favours) or -integer (faction the NPC distrusts). Phase 6 M5
+    /// uses these to decide how an NPC reacts to the player's faction
+    /// standing; M1/M2 only display them in the disposition tooltip.
+    /// </summary>
+    [JsonPropertyName("faction_affinity")]
+    public Dictionary<string, int> FactionAffinity { get; init; } = new();
+}