### What problem does this PR solve?
_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
- Update sync data source to handle metadata properly
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
---------
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
### What problem does this PR solve?
This PR adds webdav storage as data source for data sync service.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### Type of change
* [x] New Feature (non-breaking change which adds functionality)
Add support for Virtual Hosted Style and Path Style URL addressing in
S3_COMPATIBLE storage connector. Default to Virtual Hosted Style for
better compatibility with COS and other S3-compatible services.
- Add addressing_style field to credentials (virtual/path)
- Update frontend form with selection dropdown
- Add validation and tooltips for S3 Compatible endpoint URL
<img width="703" height="875" alt="image"
src="https://github.com/user-attachments/assets/af5ba7ca-f160-47fa-8ba1-32eace8f5fdf"
/>
<img width="1620" height="788" alt="image"
src="https://github.com/user-attachments/assets/6012b5ce-8bcb-478e-a9cb-425f886d5046"
/>
---------
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
### What problem does this PR solve?
This PR adds a native Moodle connector to sync content (courses,
resources, forums, assignments, pages, books) into RAGFlow.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
---------
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
### What problem does this PR solve?
Enriches rich text (links, mentions, equations), flags to-do blocks with
[x]/[ ], captures block-level equations, builds table HTML, downloads
attachments.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
PR for implementing s3 compatible storage units #11240
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Add fault-tolerant mechanism to RAPTOR.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Confluence cannot retrieve updated files。
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Refine Confluence connector.
#10953
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
- [x] Refactoring
