feat: 新增文档模型类，调整配置与解析逻辑，优化日志及导入

移除日志设置与冗余代码，优化导入、类型提示及OCR后端管理
统一调整各文件模块导入路径为绝对导入
调整导入路径，移除部分导入，优化日志及注释
升级文档解析器为 Docx2Parser，优化超时与图片处理逻辑

docreader/utils/tempfile.py

@@ -0,0 +1,77 @@
+import logging
+import os
+import tempfile
+
+logger = logging.getLogger(__name__)
+
+
+class TempFileContext:
+    def __init__(self, file_content: bytes, suffix: str):
+        """
+        Initialize the context
+        :param file_content: Byte data to write to file
+        :param suffix: File suffix
+        """
+        self.file_content = file_content
+        self.suffix = suffix
+        self.file = None
+
+    def __enter__(self):
+        """
+        Create file when entering context
+        """
+        self.temp_file = tempfile.NamedTemporaryFile(suffix=self.suffix, delete=False)
+        self.temp_file.write(self.file_content)
+        self.temp_file.flush()
+        logger.info(
+            f"Saved {self.suffix} content to temporary file: {self.temp_file.name}"
+        )
+        return self.temp_file.name
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        """
+        Delete file when exiting context
+        """
+        if self.temp_file:
+            self.temp_file.close()
+            if os.path.exists(self.temp_file.name):
+                os.remove(self.temp_file.name)
+            logger.info(f"File {self.temp_file.name} has been deleted.")
+        # Return False to propagate exception (if any exception occurred)
+        return False
+
+
+class TempDirContext:
+    def __init__(self):
+        """
+        Initialize the context
+        """
+        self.temp_dir = None
+
+    def __enter__(self):
+        """
+        Create directory when entering context
+        """
+        self.temp_dir = tempfile.TemporaryDirectory()
+        logger.info(f"Created temporary directory: {self.temp_dir.name}")
+        return self.temp_dir.name
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        """
+        Delete directory when exiting context
+        """
+        if self.temp_dir and os.path.exists(self.temp_dir.name):
+            self.temp_dir.cleanup()
+            logger.info(f"Directory {self.temp_dir.name} has been deleted.")
+        # Return False to propagate exception (if any exception occurred)
+        return False
+
+
+if __name__ == "__main__":
+    example_bytes = b"Hello, this is a test file."
+    file_name = "test_file.txt"
+
+    # Using with statement
+    with TempFileContext(example_bytes, file_name) as temp_file:
+        # File operations can be performed within the context
+        print(f"Does file {file_name} exist: {os.path.exists(file_name)}")