🐛 Fix parse_cors function to be consistent for both empty string and empty list (#1672)

Author: rolkotaki

backend/app/core/config.py

@@ -17,7 +17,7 @@
 
 def parse_cors(v: Any) -> list[str] | str:
     if isinstance(v, str) and not v.startswith("["):
-        return [i.strip() for i in v.split(",")]
+        return [i.strip() for i in v.split(",") if i.strip()]
     elif isinstance(v, list | str):
         return v
     raise ValueError(v)