feat(battle-engine): M1 auto-copy closure (782 battle-logic files)

Compile-driven bulk-copy loop (tools/engine-port/m1_copy_loop.py) pulled the precise reference closure of the battle-core roots, stopping at the classify god-object/View-VFX-UI boundary. 782 files; no re-explosion (M0 had estimated ~order 1000). Residual frontier = 52 shim-classified + 80 external (Unity/BCL) types to author next.

SVSim.BattleEngine/Engine/CardPack.cs

@@ -0,0 +1,22 @@
+public class CardPack : HeaderData
+{
+	public int card_id;
+
+	public int base_card_id;
+
+	public int rarity;
+
+	public string create_time;
+
+	public string update_time;
+
+	public string delete_time;
+
+	public string affected_rows;
+
+	public int SleeveId { get; set; } = 3000011;
+
+	public bool IsSpecialCard { get; set; }
+
+	public bool IsFreePackLeaderSkin { get; set; }
+}