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/Rules/Combat/SaveResult.cs

@@ -0,0 +1,14 @@
+using Theriapolis.Core.Rules.Stats;
+
+namespace Theriapolis.Core.Rules.Combat;
+
+public sealed record SaveResult
+{
+    public required int    TargetId    { get; init; }
+    public required SaveId Save        { get; init; }
+    public required int    D20Roll     { get; init; }
+    public required int    SaveBonus   { get; init; }
+    public required int    SaveTotal   { get; init; }   // D20Roll + bonus
+    public required int    Dc          { get; init; }
+    public required bool   Succeeded   { get; init; }
+}