fix: 部署脚本输出缓冲导致日志不实时打印的问题

io.TextIOWrapper 默认使用块缓冲，子脚本长时间输出时被缓冲不显示。
添加 line_buffering=True 确保每行实时刷新到终端。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

deploy.py

@@ -29,8 +29,8 @@ from pathlib import Path
 
 # 强制 stdout/stderr 使用 UTF-8 编码，避免 Windows GBK 编码错误
 if hasattr(sys.stdout, 'buffer'):
-    sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding='utf-8', errors='replace')
-    sys.stderr = io.TextIOWrapper(sys.stderr.buffer, encoding='utf-8', errors='replace')
+    sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding='utf-8', errors='replace', line_buffering=True)
+    sys.stderr = io.TextIOWrapper(sys.stderr.buffer, encoding='utf-8', errors='replace', line_buffering=True)
 
 # ============================================================================
 # 配置