Organic construction v2: three verified fixes, one open problem

Fixes (headless-verified): homes founded at the habitual sleeping spot
within reach of the community (not at distant stone mines); night sends
everyone to bed so beds are used and rough nights actually occur; a bed
must exist at arrival - floor-sleepers at full shelters now count as
unsheltered. Diagnostics added: incomplete_sites stat column, founding
logs.

Open (documented in FINDINGS.md, paused by request): the loop builds
forward but cannot rebuild after loss - winter crises ruin shelters and
recovery stalls (4 foundings in 240 days, no granary after two famines).

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

scripts/StatsLogger.cs

@@ -21,7 +21,7 @@ public static class StatsLogger
         "avg_fatigue,avg_nourish,avg_health,carried," +
         "gather_ticks,build_ticks,trade_ticks,rest_ticks,social_ticks," +
         "shelters_done,ruins,avg_cond,upkeep_stock,burn_per_day,modules,granary_food," +
-        "avg_debris,refusals";
+        "avg_debris,refusals,incomplete_sites";
 
     private const string NpcHeader =
         "day,npc,name,soul,town,dominant,gather_ticks,build_ticks,trade_ticks,rest_ticks,social_ticks," +
@@ -139,7 +139,11 @@ public static class StatsLogger
         float debrisSum = 0f;
         foreach (var npc in gm.Npcs) debrisSum += npc.Imprint.Total;
         row.Append((debrisSum / count).ToString("0.0000", ci)).Append(',');
-        row.Append(TradeSystem.RefusalsToday);
+        row.Append(TradeSystem.RefusalsToday).Append(',');
+
+        int incomplete = 0;
+        foreach (var b in gm.Buildings) if (!b.IsComplete) incomplete++;
+        row.Append(incomplete);
 
         File.AppendAllText(_path, row + "\n");