Fix slot

* Download: Expand slots.room
* Transform: Parse first slot

# Conflicts:
#	src/download.py

Author: NMertsch

src/models/pretalx.py

@@ -33,7 +33,7 @@ class PretalxSlot(BaseModel):
     @classmethod
     def handle_localized(cls, v) -> str | None:
         if isinstance(v, dict):
-            return v.get("en")
+            return v["name"].get("en")
         return v
 
 
@@ -96,8 +96,9 @@ def handle_resources(cls, v) -> list[dict[str, str]] | None:
     @classmethod
     def process_values(cls, values) -> dict:
         # Set slot information
-        if values.get("slot"):
-            slot = PretalxSlot.model_validate(values["slot"])
+        if values.get("slots"):
+            slot = PretalxSlot.model_validate(values["slots"][0])
+            values["slot"] = slot
             values["room"] = slot.room
             values["start"] = slot.start
             values["end"] = slot.end