fix(hs): robust team-base gate selection by Y-position (not exact coords)

GetTeamSpawnGate matched gates by exact X1/Y1 anchors, which threw
'Sequence contains no matching element' when the DB gate coords drifted a
tile from the code anchors. Now selects the two spawn gates by Y-order
(red=top, blue=bottom) so it works regardless of exact coordinates.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/GameLogic/MiniGames/HeykelSavasiContext.cs

@@ -233,11 +233,19 @@ public class HeykelSavasiContext : MiniGameContext
     /// </remarks>
     public ExitGate GetTeamSpawnGate(HeykelSavasiTeam team)
     {
-        var (anchorX1, anchorY1) = team == HeykelSavasiTeam.Blue
+        // Robust selection: the map has exactly two spawn gates (one per base). The red base sits at
-            ? (BlueBaseAnchorX1, BlueBaseAnchorY1)
+        // the top of the arena (smaller Y), the blue base at the bottom (larger Y). Selecting by Y-order
-            : (RedBaseAnchorX1, RedBaseAnchorY1);
+        // avoids brittle exact-coordinate matching (gate coords can drift by a tile between data paths).
+        var spawnGates = this.Definition.Entrance!.Map!.ExitGates
+            .Where(g => g.IsSpawnGate)
+            .OrderBy(g => g.Y1)
+            .ToList();
+        if (spawnGates.Count == 0)
+        {
+            return this.Definition.Entrance!;
+        }
 
-        return this.Definition.Entrance!.Map!.ExitGates.First(g => g.X1 == anchorX1 && g.Y1 == anchorY1);
+        return team == HeykelSavasiTeam.Blue ? spawnGates[^1] : spawnGates[0];
     }
 
     /// <summary>