### What problem does this PR solve?
When there are multiple files with the same name the file would just
duplicate, making it hard to distinguish between the different files.
Now if there are multiple files with the same name, they will be named
after their folder path in the storage unit.
This was done for the webdav connector and with this PR also for Notion,
Confluence and S3 Storage.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
Contribution by RAGcon GmbH, visit us [here](https://www.ragcon.ai/)
### 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?
This PR adds webdav storage as data source for data sync service.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### 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?
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?
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
