Text overrides restored file due to trailing newline

Describe the bug
Text auto saves unchanged file upon opening, no editing, due to a normalizer behavior. See videos:

To Reproduce
From the video, you need to restore a file and needs to have one specific thing, a trailing newline::

1. restored version : 150 bytes, tail "...old line :)\n\n🌴\n"
2. what Text wrote : 149 bytes, tail "...old line :)\n\n🌴"
3. first difference at byte 149: restored "\n" vs written ""

Expected behavior
The serialiser should preserve a trailing newline, or SaveService should not write when the only difference is its own normalization. It's easy to demonstrate without Notes at all - put a markdown file ending in a newline in Files, open it in the Viewer, don't touch it, and a version appears within ~10 seconds.

Screenshots

https://github.com/user-attachments/assets/cdc53c60-243d-4400-994f-3647ead032f5

https://github.com/user-attachments/assets/9fbbed38-6bf2-4e17-afca-32a066ab50d1

Server details:

• Nextcloud version: master
• PHP Version: -
• Database: -
• I use the docker dev setup

Client details:

• OS: Win11pro
• Browser: FF
• Browser version: 153.0.4
• Device: Desktop

Insert your Nextcloud log here

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log
c) ...

Start at the SaveService and serializer path used by the Viewer, reproducing the issue with a markdown file whose content ends in a trailing newline. Done means opening an unchanged file no longer creates a new version, while serialization preserves the trailing newline.