feat: Deduplicates spawns. Adds spawnbounds where needed. (#2299)

### Summary

- Add z-restricted spawnBounds to 35 spawners across 15 files to prevent creatures from spawning on incorrect floors
- Building spawners (Pyramid, Fire dungeon, Shame, Vendors) use minZ = spawner_z to prevent spawning below
- Ground level spawners (Graveyards, Outdoors, Tokuno) use minZ = -128 for natural terrain variation
- Multi-floor structures in Ilshenar use floor-specific Z restrictions

### Test plan

- Verify spawners in Fire dungeon building don't spawn creatures on floors below
- Verify Pyramid spawners keep creatures on their respective levels
- Verify ground level spawners (graveyards, outdoors) still spawn correctly on terrain
- Check Ilshenar multi-floor structure spawns creatures on correct floors

Distribution/Data/Spawns/shared/malas/Bedlam.json

@@ -0,0 +1,42 @@
+[
+  {
+    "type": "Spawner",
+    "guid": "8c2124f4-e175-4198-8cf8-9cf64804fc22",
+    "name": "Spawner (408)",
+    "location": [98, 1656, 0],
+    "map": "Malas",
+    "count": 16,
+    "minDelay": "00:05:00",
+    "maxDelay": "00:10:00",
+    "team": 0,
+    "homeRange": 40,
+    "walkingRange": 40,
+    "entries": [
+      { "name": "GoreFiend", "maxCount": 4, "probability": 100 },
+      { "name": "PatchworkSkeleton", "maxCount": 4, "probability": 100 },
+      { "name": "BoneKnight", "maxCount": 6, "probability": 100 },
+      { "name": "BoneMagi", "maxCount": 6, "probability": 100 },
+      { "name": "BoneKnight", "maxCount": 6, "probability": 100 },
+      { "name": "SkeletalMage", "maxCount": 6, "probability": 100 },
+      { "name": "Zombie", "maxCount": 4, "probability": 100 },
+      { "name": "Skeleton", "maxCount": 4, "probability": 100 },
+      { "name": "RottingCorpse", "maxCount": 2, "probability": 100 }
+    ]
+  },
+  {
+    "type": "Spawner",
+    "guid": "eaa69fa3-4076-4fc5-950a-fe175713bbd3",
+    "name": "Spawner (408)",
+    "location": [104, 1655, 0],
+    "map": "Malas",
+    "count": 1,
+    "minDelay": "00:15:00",
+    "maxDelay": "00:30:00",
+    "team": 0,
+    "homeRange": 15,
+    "walkingRange": 15,
+    "entries": [
+      { "name": "RedDeath", "maxCount": 1, "probability": 100 }
+    ]
+  }
+]