feat: Add Extraction model and seed main playlist functionality

app/models/user.py

@@ -6,10 +6,10 @@ from sqlmodel import Field, Relationship
 from app.models.base import BaseModel
 
 if TYPE_CHECKING:
+    from app.models.extraction import Extraction
     from app.models.plan import Plan
     from app.models.playlist import Playlist
     from app.models.sound_played import SoundPlayed
-    from app.models.stream import Stream
     from app.models.user_oauth import UserOauth
 
 
@@ -34,4 +34,4 @@ class User(BaseModel, table=True):
     plan: "Plan" = Relationship(back_populates="users")
     playlists: list["Playlist"] = Relationship(back_populates="user")
     sounds_played: list["SoundPlayed"] = Relationship(back_populates="user")
-    streams: list["Stream"] = Relationship(back_populates="user")
+    extractions: list["Extraction"] = Relationship(back_populates="user")