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/parser/chain_parser.py

@@ -0,0 +1,70 @@
+import logging
+from typing import List, Tuple, Type
+
+from docreader.models.document import Document
+from docreader.parser.base_parser import BaseParser
+from docreader.utils import endecode
+
+logger = logging.getLogger(__name__)
+
+
+class FirstParser(BaseParser):
+    _parser_cls: Tuple[Type["BaseParser"], ...] = ()
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self._parsers: List[BaseParser] = []
+        for parser_cls in self._parser_cls:
+            try:
+                parser = parser_cls(*args, **kwargs)
+                self._parsers.append(parser)
+            except Exception as e:
+                logger.error(f"Failed to create parser {parser_cls.__name__}: {e}")
+
+    def parse_into_text(self, content: bytes) -> Document:
+        for p in self._parsers:
+            document = p.parse_into_text(content)
+            if document.is_valid():
+                return document
+        return Document()
+
+    @classmethod
+    def create(cls, *parser_classes: Type["BaseParser"]) -> Type["FirstParser"]:
+        names = "_".join([p.__name__ for p in parser_classes])
+        return type(f"FirstParser_{names}", (cls,), {"_parser_cls": parser_classes})
+
+
+class PipelineParser(BaseParser):
+    _parser_cls: Tuple[Type["BaseParser"], ...] = ()
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self._parsers: List[BaseParser] = []
+        for parser_cls in self._parser_cls:
+            try:
+                parser = parser_cls(*args, **kwargs)
+                self._parsers.append(parser)
+            except Exception as e:
+                logger.error(f"Failed to create parser {parser_cls.__name__}: {e}")
+
+    def parse_into_text(self, content: bytes) -> Document:
+        document = Document()
+        for p in self._parsers:
+            document = p.parse_into_text(content)
+            content = endecode.encode_bytes(document.content)
+        return document
+
+    @classmethod
+    def create(cls, *parser_classes: Type["BaseParser"]) -> Type["PipelineParser"]:
+        names = "_".join([p.__name__ for p in parser_classes])
+        return type(f"PipelineParser_{names}", (cls,), {"_parser_cls": parser_classes})
+
+
+if __name__ == "__main__":
+    from docreader.parser.markdown_parser import MarkdownParser
+
+    cls = FirstParser.create(MarkdownParser)
+    parser = cls()
+    print(parser.parse_into_text(b"aaa"))