models: it's not an error if we can continue operating

src/teilchensammler_cli/models.py

@@ -52,7 +52,7 @@ async def make_teilchen_input(text: str) -> TeilchenCreate | None:
         name = text[0:name_end]
 
     if not name:
-        logger.error("Could not extract name.")
+        logger.warning("Could not extract name.")
         logger.debug("Could not extract name from input: %s", text)
         return None