[Bug]: add directory when unsupported file exists

[MaojiaSheng]

Bug Description

”新问题：提示不支持 .doc .wps
这也是在说明文件里面没有提到的问题
.wps 是不支持，还没有适配。doc 应该是没有枚举到，之前支持了 docx
一个目录中，导入 550个文件， 识别出 未支持72个文件，然后服务端就会中断加入到resources，也不会有错误提示。“

this issue is also related to #83

Steps to Reproduce

add a dir with .doc, .wps files

Expected Behavior

1. add all
2. ignore and feedback unsupported

Actual Behavior

break and failed

Minimal Reproducible Example

Error Logs

OpenViking Version

v0.1.18

Python Version

3.12

Operating System

Linux

Model Backend

None

Additional Context

No response

[shaoeric]

#128 使用markitdown支持的office组件，但markitdown支持docx 不支持doc，为了跨平台应用考虑，优先考虑让用户自己转换成docx pptx xlsx文件后上传

[MaojiaSheng]

后面我们考虑提供云上的解析模型服务，来适配大量的长尾格式。似乎没有哪个开源项目能承诺解决所有格式

[r266-tech]

Hi, I looked into this issue and found that the current main branch already has a directory scan architecture (directory_scan.py) that separates files into processable and unsupported categories, so the "all files fail" crash should no longer occur.

However, the core pain point remains: .doc and .wps files are not supported — they get classified as unsupported and silently skipped. The WordParser only handles .docx.

I'd like to submit a PR to add .doc support using docx2txt (pure Python, no system dependencies). This would directly address the original reporter's use case (550 files with 72 unsupported).

Would this direction be welcome?