♻️(backend) pass API token to Yprovider with scheme Bearer

Signed-off-by: Stephan Meijer <me@stephanmeijer.com>

src/backend/core/services/converter_services.py

@@ -26,7 +26,7 @@ class YdocConverter:
     def auth_header(self):
         """Build microservice authentication header."""
         # Note: Yprovider microservice accepts only raw token, which is not recommended
-        return settings.Y_PROVIDER_API_KEY
+        return f"Bearer {settings.Y_PROVIDER_API_KEY}"
 
     def convert(self, text):
         """Convert a Markdown text into our internal format using an external microservice."""