fc3h: collapse multi-line sqlalchemy import in backup_run.py — fits under line-length=100, ruff I001 would bounce

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend/app/models/backup_run.py

@@ -20,15 +20,7 @@ feedback_check_existing_enums):
 
 from datetime import datetime
 
-from sqlalchemy import (
+from sqlalchemy import JSON, BigInteger, DateTime, ForeignKey, Integer, String, Text
-    JSON,
-    BigInteger,
-    DateTime,
-    ForeignKey,
-    Integer,
-    String,
-    Text,
-)
 from sqlalchemy.orm import Mapped, mapped_column
 
 from .base import Base