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>

.gitignore

@@ -9,5 +9,6 @@ obj/
 *.csproj.user
 
 # Soak-test outputs — regenerated every run; findings are curated in FINDINGS.md
-soak_*.csv
-soak_*.csv.import
+soak/*.csv
+soak/*.csv.import
+soak/*.translation

Main.tscn

@@ -5,7 +5,7 @@
 
 [node name="Main" type="Node2D" unique_id=1549676286]
 script = ExtResource("1_gm")
-TicksPerRealSecond = 1800.0
+TicksPerRealSecond = 2000.0
 StopAfterDays = 240
 
 [node name="Visualization" type="Node2D" parent="." unique_id=1946930493]

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");