Fix ruff lint errors across codebase

- Auto-fix F401 (unused imports) and I001 (unsorted imports) with ruff --fix
- Manually fix E501 (line too long) in alembic migrations and src/ models
- Run ruff format to ensure consistent formatting

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/cartsnitch_api/models/user.py

@@ -26,9 +26,7 @@ class User(TimestampMixin, Base):
     email: Mapped[str] = mapped_column(String(255), nullable=False, unique=True)
     hashed_password: Mapped[str | None] = mapped_column(String(255), nullable=True)
     display_name: Mapped[str | None] = mapped_column(String(100))
-    email_verified: Mapped[bool] = mapped_column(
-        Boolean, nullable=False, server_default="false"
-    )
+    email_verified: Mapped[bool] = mapped_column(Boolean, nullable=False, server_default="false")
     image: Mapped[str | None] = mapped_column(Text, nullable=True)
     email_inbound_token: Mapped[str] = mapped_column(
         String(22),
@@ -36,7 +34,8 @@ class User(TimestampMixin, Base):
         unique=True,
         default=lambda: secrets.token_urlsafe(16),
         server_default=sa.text(
-            "replace(replace(trim(trailing '=' from encode(gen_random_bytes(16), 'base64')), '+', '-'), '/', '_')"
+            "replace(replace(trim(trailing '=' from "
+            "encode(gen_random_bytes(16), 'base64')), '+', '-'), '/', '_')"
         ),
     )