chore(security): 凭据治理收口 — 清除硬编码DB账号/口令，脚本与API统一从 backend/.env 读取(无明文兜底)；取消跟踪 .pyc 构建产物 (credential-governance-20260912)

backend/scripts/import_product_sales.py

@@ -6,11 +6,22 @@ import os
 import re
 import pymysql
 
+# 2026-09-12 库访问治理（ops）：口令改从 .env 读取，清除硬编码
+import os as _os_gov
+try:
+    from dotenv import load_dotenv as _ld_gov
+    _ld_gov('/root/cma-management/backend/.env', override=False)
+except Exception:
+    pass
+_CMA_DB_PASS = _os_gov.getenv('CMA_DB_PASS', '')
+_CMA_DB_USER = _os_gov.getenv('CMA_DB_USER', '')
+_CMA_DB_HOST = _os_gov.getenv('CMA_DB_HOST', '127.0.0.1')
+
 # DB连接
 DB_CONFIG = {
     'host': '127.0.0.1',
-    'user': 'cma_user',
-    'password': 'cma_pass_2026',
+    'user': _CMA_DB_USER,
+    'password': _CMA_DB_PASS,
     'database': 'cma',
     'charset': 'utf8mb4',
 }