### 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/)
### 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?
PR for implementing s3 compatible storage units #11240
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
