fix: 清除硬编码API Key与机器特定路径，改用环境变量+混合式路径解析

test-data/test_deep_validation.py

@@ -47,7 +47,8 @@ from cobol_testgen.read import resolve_copybooks, preprocess, extract_procedure_
 from cobol_testgen.core import build_branch_tree
 
 try:
-    src_path = Path("D:/cobol-java/sample_ソース_SAN01MAT.cbl")
+    from _paths import SAMPLE_SRC_DIR
+    src_path = SAMPLE_SRC_DIR / "sample_ソース_SAN01MAT.cbl"
     src = src_path.read_text(encoding="utf-8")
     sdir = str(src_path.parent)
 
@@ -89,7 +90,8 @@ section("2. HINA分類: 実プログラム判定精度")
 from hina.classifier import compute_confidence
 
 # jcl-cobol-git の4プログラム
-cobol_git = Path("D:/cobol-java/jcl-cobol-git/cobol")
+from _paths import COBOL_GIT_ROOT
+cobol_git = COBOL_GIT_ROOT / "cobol"
 if cobol_git.exists():
     for f in ['CRDVAL', 'CRDCALC', 'CRDRPT', 'GENDATA']:
         try: