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/CombatLogEntry.cs

@@ -0,0 +1,29 @@
+namespace Theriapolis.Core.Rules.Combat;
+
+/// <summary>
+/// One human-readable line in the encounter log. Combat-resolver actions
+/// (attacks, saves, conditions, deaths) each emit one of these so test
+/// scenarios can assert on the log content as a whole.
+/// </summary>
+public sealed record CombatLogEntry
+{
+    public enum Kind : byte
+    {
+        Note          = 0,  // generic flavour line ("Round 1 begins.")
+        Attack        = 1,
+        Save          = 2,
+        Damage        = 3,  // direct damage that wasn't an attack roll
+        ConditionApplied = 4,
+        ConditionEnded   = 5,
+        Death         = 6,
+        Initiative    = 7,
+        TurnStart     = 8,
+        Move          = 9,
+        EncounterEnd  = 10,
+    }
+
+    public required int    Round    { get; init; }
+    public required int    Turn     { get; init; }
+    public required Kind   Type     { get; init; }
+    public required string Message  { get; init; }
+}