refactor: clean up code by adding missing commas and improving import order

app/models/user_oauth.py

@@ -1,9 +1,9 @@
 """User OAuth model for storing user's connected providers."""
 
 from datetime import datetime
-from typing import Optional, TYPE_CHECKING
+from typing import TYPE_CHECKING, Optional
 
-from sqlalchemy import String, DateTime, Text, ForeignKey
+from sqlalchemy import DateTime, ForeignKey, String, Text
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.database import db
@@ -29,11 +29,11 @@ class UserOAuth(db.Model):
     # Provider-specific user information
     email: Mapped[str] = mapped_column(String(255), nullable=False)
     name: Mapped[str] = mapped_column(String(255), nullable=False)
-    picture: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
+    picture: Mapped[str | None] = mapped_column(Text, nullable=True)
 
     # Timestamps
     created_at: Mapped[datetime] = mapped_column(
-        DateTime, default=datetime.utcnow, nullable=False
+        DateTime, default=datetime.utcnow, nullable=False,
     )
     updated_at: Mapped[datetime] = mapped_column(
         DateTime,
@@ -45,13 +45,13 @@ class UserOAuth(db.Model):
     # Unique constraint on provider + provider_id combination
     __table_args__ = (
         db.UniqueConstraint(
-            "provider", "provider_id", name="unique_provider_user"
+            "provider", "provider_id", name="unique_provider_user",
         ),
     )
 
     # Relationships
     user: Mapped["User"] = relationship(
-        "User", back_populates="oauth_providers"
+        "User", back_populates="oauth_providers",
     )
 
     def __repr__(self) -> str:
@@ -73,11 +73,11 @@ class UserOAuth(db.Model):
 
     @classmethod
     def find_by_provider_and_id(
-        cls, provider: str, provider_id: str
+        cls, provider: str, provider_id: str,
     ) -> Optional["UserOAuth"]:
         """Find OAuth provider by provider name and provider ID."""
         return cls.query.filter_by(
-            provider=provider, provider_id=provider_id
+            provider=provider, provider_id=provider_id,
         ).first()
 
     @classmethod
@@ -88,7 +88,7 @@ class UserOAuth(db.Model):
         provider_id: str,
         email: str,
         name: str,
-        picture: Optional[str] = None,
+        picture: str | None = None,
     ) -> "UserOAuth":
         """Create new OAuth provider or update existing one."""
         oauth_provider = cls.find_by_provider_and_id(provider, provider_id)