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/s23_coverage_report.py

@@ -2,9 +2,9 @@
 import sys, os, re, subprocess, time
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
 
-ROOT_BENCH = "D:/cobol-java/cobol-test-programs/"
+from _paths import BENCH_ROOT as ROOT_BENCH, COPYBOOKS_BENCH
 COPYBOOKS_BENCH = os.path.join(ROOT_BENCH, "common", "copybooks")
-ROOT_TNA = "D:/cobol-java/cobol-tna-system/"
+from _paths import TNA_ROOT as ROOT_TNA
 COPYBOOKS_TNA = os.path.join(ROOT_TNA, "cpy")
 
 from cobol_testgen import extract_structure, generate_data