[Bug] Tags with non-ascii characters cannot be resolved
Hi,
I am hosting Gancio in turkish; the handling of tags with non-ascii characters seems to be broken.
The tag in quest, namely `Üniversite Etkinliği`, contains the character `Ü`(U+00DC) that is sometimes used in other latin based alphabets and `ğ` (U+011F) which is -afaik- uniquely turkish. I found the following problems involving this tag:
- The tag cannot be added to other events
Results in a "Validation Error"
- The tag cannot be found when accessed through `/tag/{tagname}`
This is the relevant log line:
```gancio | 2024-01-16T13:41:50.445Z debug: GET /api/tag/%C3%9Cniversite%20Etkinli%C4%9Fi```
issue