refactor: adapt internal Timeslot model

src/aura_engine/scheduling/domain.py

@@ -324,7 +324,7 @@ class Timeslot:
 
     """
 
-    id: int
+    id: str
     repetition_id = int
     start: int
     end: int
@@ -334,7 +334,7 @@ class Timeslot:
     playlists: Playlists
 
     def __init__(
-        self, id: int, repetition_id: int, start: float, end: float, show: Show, episode: Episode
+        self, id: str, repetition_id: int, start: float, end: float, show: Show, episode: Episode
     ):
         """
         Initialize.
@@ -355,7 +355,7 @@ class Timeslot:
         self.episode = episode
         self.playlists = Playlists(None, None, None)
 
-    def get_id(self) -> int:
+    def get_id(self) -> str:
         """
         Get ID.