feat(tpc): 翻译进度日志带源文件路径与耗时——并行时不再只有 sha1

- 用户反馈并行分支日志只有 -> xxx.ll（sha1 无文件名无耗时），看不到进度
- _translate_file 加计时，打印改为 '-> xxx.ll  <源文件相对路径> (Xs)'（含仅声明分支）

lib/Projectrans/Phase2Translator.py

@@ -1372,6 +1372,7 @@ class Phase2Translator:
 
     def _translate_file(self, src_path: str, out_path: str, prebuilt_ModuleSha1Map: dict[str, str] | None = None) -> None:
         """翻译单个源文件，嵌入相关 .stub.ll 声明"""
+        _t0: float = time.time()
         with open(src_path, 'r', encoding='utf-8') as f:
             code = f.read()
 
@@ -1593,7 +1594,7 @@ class Phase2Translator:
                 f.write(text_content)
             self._save_deps(sha1, ModuleSha1Map)
 
-            _vlog().info(f"  -> {os.path.basename(out_path)}")
+            _vlog().info(f"  -> {os.path.basename(out_path)}  {os.path.relpath(src_path, self.src_root) if src_path else ''} ({time.time() - _t0:.1f}s)")
         else:
             stub_path = self.stub_files.get(sha1)
             if stub_path and os.path.exists(stub_path):
@@ -1604,7 +1605,7 @@ class Phase2Translator:
                     stub_content = f.read()
                 with open(out_path, 'w', encoding='utf-8', newline='\n') as f:
                     f.write(stub_content)
-                _vlog().info(f"  -> {os.path.basename(out_path)} (仅声明)")
+                _vlog().info(f"  -> {os.path.basename(out_path)}  {os.path.relpath(src_path, self.src_root) if src_path else ''} (仅声明, {time.time() - _t0:.1f}s)")
 
     def _register_package_reexports(self, trans, init_pyi_path: str, package_name: str) -> None:
         """解析 __init__.pyi 中的 from .xxx import yyy 或 from __xxx import yyy，在包级别注册导出符号"""