Move soak output to soak/ folder with .gdignore

CSVs now write to soak/ instead of the project root. A .gdignore there
stops the Godot editor from importing CSV columns as translation files -
which had been silently generating 50+ .translation and .import files per
run. Only the .gdignore is tracked; the CSVs stay ignored. Root is clean.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/StatsLogger.cs

@@ -35,7 +35,11 @@ public static class StatsLogger
 
     public static void Init()
     {
-        string dir = ProjectSettings.GlobalizePath("res://");
+        // Write into soak/ — a plain folder Godot doesn't import as assets
+        // (a .gdignore there stops the editor from turning CSV columns into
+        // translation files). Keeps generated debug output out of the way.
+        string dir = Path.Combine(ProjectSettings.GlobalizePath("res://"), "soak");
+        Directory.CreateDirectory(dir);
         _path     = Path.Combine(dir, "soak_stats.csv");
         _npcPath  = Path.Combine(dir, "soak_npc_days.csv");
         _giftPath = Path.Combine(dir, "soak_gifts.csv");