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/s22_tna_e2e.py

@@ -8,7 +8,7 @@ P=0;F=0
 def ck(v,m=""): global P,F; (P:=P+1) if v else (F:=F+1, print(f"  FAIL {m}"))
 def sec(n): print(f"\n{'='*60}\n{n}\n{'='*60}")
 
-ROOT = "D:/cobol-java/cobol-tna-system/"
+from _paths import TNA_ROOT as ROOT
 COPYBOOKS = os.path.join(ROOT, "cpy")
 BINDIR = os.path.join(ROOT, "bin")
 COBC = "cobc"