Added cave cell kernel

- Decide whole 8x8 adaptive cells as solid or open from lattice corner bounds with an ulp guard
- Evaluate only mixed cells per column with the original bilinear arithmetic
- Share the row kernel between serial and parallel adaptive classification
- Count solid, open and mixed cells and exact rows, printed by the generation probe
- Pin carve write sequences for eight carver configurations with golden hashes

probe/src/main/java/art/arcane/iris/probe/GenerationProbe.java

@@ -18,6 +18,7 @@
 
 package art.arcane.iris.probe;
 
+import art.arcane.iris.generation.mantle.IrisCaveCarver3D;
 import art.arcane.iris.pack.loading.IrisData;
 import art.arcane.iris.pack.PackValidationResult;
 import art.arcane.iris.pack.PackValidator;
@@ -302,6 +303,7 @@ public final class GenerationProbe {
         try {
             ProbeResult result = run(configuration, options);
             System.out.println(result.machineLine());
+            System.out.println(IrisCaveCarver3D.cellCounters().machineLine());
             exitCode = result.failedChunks() == 0 ? 0 : 1;
         } catch (Throwable e) {
             System.out.println("[genprobe] FAIL: probe execution failed");