test: skip test_behavior_return_value_correctness when JAR missing

Same fix as test_comparator.py — uses _find_comparator_jar() to skip
when the codeflash-runtime JAR isn't built. Fixes Windows unit-tests
which don't have Java pre-installed (unlike Linux runners).

tests/test_languages/test_java/test_run_and_parse.py

@@ -13,6 +13,13 @@ from pathlib import Path
 
 import pytest
 
+from codeflash.languages.java.comparator import _find_comparator_jar
+
+requires_java_runtime = pytest.mark.skipif(
+    _find_comparator_jar() is None,
+    reason="codeflash-runtime JAR not found - skipping Java integration tests",
+)
+
 from codeflash.discovery.functions_to_optimize import FunctionToOptimize
 from codeflash.languages.base import Language
 from codeflash.languages.current import set_current_language
@@ -369,6 +376,7 @@ public class AdderMultiTest {
         assert "testAddPositive" in test_names
         assert "testAddZero" in test_names
 
+    @requires_java_runtime
     def test_behavior_return_value_correctness(self, tmp_path):
         """Verify the Comparator JAR correctly identifies equivalent vs. differing results.