Refactor app initialization and migration script: make __init__.py intentionally empty for package structure, and update migrate.py to include project root in Python path for improved module accessibility.

app/__init__.py

@@ -1,4 +1,4 @@
 """App package initialization."""
-from app.models import Base
 
-__all__ = ['Base'] 
+# This file intentionally left empty to make the directory a Python package.
+# We'll import models where they're needed rather than at the package level. 

scripts/migrate.py

@@ -1,8 +1,14 @@
 """Database migration script."""
 import os
+import sys
 import logging
 from alembic.config import Config
 from alembic import command
+
+# Add the project root to the Python path
+project_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+sys.path.insert(0, project_root)
+
 from app.models.database import Base
 
 # Configure logging