feat: Update cost of Segmented Ribcage

Segmented Ribcages are now obtainable from Port Cecil.

Since the byproduct of the carousel that produces them is
disproportionately large, it has been factored into the cost.

bonemarketsolver/data/costs.py

@@ -181,8 +181,9 @@ class Cost(Enum):
     SEARING_ENIGMA = 2*ACTION + 130*INFILTRATING + 2*INTERCEPTED_CABLEGRAM
 
     # Segmented Ribcage
-    # No consistent source
-    SEGMENTED_RIBCAGE = cp_model.INT32_MAX/4
+    # Port Cecil, tie, 3 at a time
+    # Byproducts subtracted from cost
+    SEGMENTED_RIBCAGE = (14*ACTION - 52.70)/3
 
     # Carved Ball of Stygian Ivory
     STYGIAN_IVORY = 250