Mattias Sehlstedt 02ba9f68ac
[Scala sttp] Fix header serialization for Optional values (#21603)
* Adjust header serialization for Optional values

* Add additional test verification to display the header type

* Do not get a null value from an option if it is empty, but rather keep the None value. If a value is present it is converted to an Option[String]
2025-08-02 11:36:40 +08:00
..
2025-06-25 21:34:58 +08:00