rewrite migrations

+ delete older migrations ... oops
+ change migratrions from "migrations" to "dbmigrations"
+ restructure migrations, order them based on release version
+ add a utils/decorators.py file with a coroutine decorator

app/models/playlist.py

@@ -11,7 +11,6 @@ class Playlist:
     """Creates playlist objects"""
 
     id: int
-    artisthashes: str | list[str]
     image: str
     last_updated: str
     name: str
@@ -26,11 +25,8 @@ class Playlist:
 
     def __post_init__(self):
         self.trackhashes = json.loads(str(self.trackhashes))
-        # self.artisthashes = json.loads(str(self.artisthashes))
         # commentted until we need it 👆
 
-        self.artisthashes = []
-
         self.count = len(self.trackhashes)
 
         if isinstance(self.settings, str):
@@ -55,4 +51,3 @@ class Playlist:
         over the API.
         """
         self.trackhashes = []
-        self.artisthashes = []