[Bug Report] oshash generation fails when using symlinks

[Karkarus]

Describe the bug
Since version 0.11.0 scanning symlinks fails most of the time as Stash tries to generate the oshash from the symlink itself instead of the actual file.
This fails almost always as the filesize of the link is often not a multiple of 8.

Error message: "error generating oshash for /data/library/testfile.mp4: oshash head: buffer is not a multiple of 8"

To Reproduce
Steps to reproduce the behavior:

1. Install Stash as a docker container as described in the README.md.
2. Create the following folder structure inside the /data folder:
   /data/library
   /data/downloads
3. Run Stash and set the library to /data/library
4. Add a video file to the /data/downloads folder
5. Create a (relative) symlink (inside the docker) from the file in the downloads folder to the library folder
6. Scan the library

Expected behavior
The file should be scanned and added to the library normally. The oshash should be generated from the video file itself, not the link. This worked until the 0.11.0 update.

Stash Version: (from Settings -> About): 0.12.0

Desktop (please complete the following information):

• OS: Ubuntu 20.04.3 LTS
• Docker Version: 20.10.12
• Docker-Compose Version: 1.29.2

Additional Information
The same problem occurs when using the Docker container for Unraid and when running the latest Linux release directly.