Update spec files to match current implementation state

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

FitnessSync/backend/src/models/__init__.py

@@ -1,7 +1,4 @@
-from sqlalchemy.ext.declarative import declarative_base
-
-# Create a base class for all models to inherit from
-Base = declarative_base()
+from .base import Base
 
 # Import all models here to ensure they're registered with the Base
 from .config import Configuration