refactor(signalr): remove SignalR server & msgpack_lazer_api

Maybe we can make `msgpack_lazer_api` independent?

app/database/playlists.py

@@ -3,6 +3,7 @@ from typing import TYPE_CHECKING
 
 from app.models.model import UTCBaseModel
 from app.models.mods import APIMod
+from app.models.playlist import PlaylistItem
 
 from .beatmap import Beatmap, BeatmapResp
 
@@ -21,8 +22,6 @@ from sqlmodel import (
 from sqlmodel.ext.asyncio.session import AsyncSession
 
 if TYPE_CHECKING:
-    from app.models.multiplayer_hub import PlaylistItem
-
     from .room import Room
 
 
@@ -73,7 +72,7 @@ class Playlist(PlaylistBase, table=True):
         return result.one()
 
     @classmethod
-    async def from_hub(cls, playlist: "PlaylistItem", room_id: int, session: AsyncSession) -> "Playlist":
+    async def from_model(cls, playlist: PlaylistItem, room_id: int, session: AsyncSession) -> "Playlist":
         next_id = await cls.get_next_id_for_room(room_id, session=session)
         return cls(
             id=next_id,
@@ -90,7 +89,7 @@ class Playlist(PlaylistBase, table=True):
         )
 
     @classmethod
-    async def update(cls, playlist: "PlaylistItem", room_id: int, session: AsyncSession):
+    async def update(cls, playlist: PlaylistItem, room_id: int, session: AsyncSession):
         db_playlist = await session.exec(select(cls).where(cls.id == playlist.id, cls.room_id == room_id))
         db_playlist = db_playlist.first()
         if db_playlist is None:
@@ -107,8 +106,8 @@ class Playlist(PlaylistBase, table=True):
         await session.commit()
 
     @classmethod
-    async def add_to_db(cls, playlist: "PlaylistItem", room_id: int, session: AsyncSession):
-        db_playlist = await cls.from_hub(playlist, room_id, session)
+    async def add_to_db(cls, playlist: PlaylistItem, room_id: int, session: AsyncSession):
+        db_playlist = await cls.from_model(playlist, room_id, session)
         session.add(db_playlist)
         await session.commit()
         await session.refresh(db_playlist)