fix: address ruff E501 line-length violations

- config.py: break long error message string across lines
- user.py: add noqa comment to preserve Postgres gen_random_bytes() default

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

alembic/versions/001_add_email_inbound_token.py

@@ -34,4 +34,4 @@ def upgrade() -> None:
 
 def downgrade() -> None:
     op.drop_constraint("uq_users_email_inbound_token", "users", type_="unique")
-    op.drop_column("users", "email_inbound_token")
+    op.drop_column("users", "email_inbound_token")