Remove unused async database and CRUD modules

- Deleted `database_async.py`, `base_async.py`, and `organization_async.py` modules due to deprecation and unused references across the project.
- Improved overall codebase clarity and minimized redundant functionality by removing unused async database logic, CRUD utilities, and organization-related operations.

backend/app/init_db.py

@@ -1,78 +0,0 @@
-# app/init_db.py
-import logging
-from typing import Optional
-
-from sqlalchemy.orm import Session
-
-from app.core.config import settings
-from app.core.database import engine
-from app.crud.user import user as user_crud
-from app.schemas.users import UserCreate
-
-logger = logging.getLogger(__name__)
-
-
-def init_db(db: Session) -> Optional[UserCreate]:
-    """
-    Initialize database with first superuser if settings are configured and user doesn't exist.
-
-    Returns:
-        The created or existing superuser, or None if creation fails
-    """
-    # Use default values if not set in environment variables
-    superuser_email = settings.FIRST_SUPERUSER_EMAIL or "admin@example.com"
-    superuser_password = settings.FIRST_SUPERUSER_PASSWORD or "Admin123!Change"
-
-    if not settings.FIRST_SUPERUSER_EMAIL or not settings.FIRST_SUPERUSER_PASSWORD:
-        logger.warning(
-            "First superuser credentials not configured in settings. "
-            f"Using defaults: {superuser_email}"
-        )
-
-    try:
-        # Check if superuser already exists
-        existing_user = user_crud.get_by_email(db, email=superuser_email)
-
-        if existing_user:
-            logger.info(f"Superuser already exists: {existing_user.email}")
-            return existing_user
-
-        # Create superuser if doesn't exist
-        user_in = UserCreate(
-            email=superuser_email,
-            password=superuser_password,
-            first_name="Admin",
-            last_name="User",
-            is_superuser=True
-        )
-
-        user = user_crud.create(db, obj_in=user_in)
-        logger.info(f"Created first superuser: {user.email}")
-
-        return user
-
-    except Exception as e:
-        logger.error(f"Error initializing database: {e}")
-        raise
-
-
-if __name__ == "__main__":
-    # Configure logging to show info logs
-    logging.basicConfig(
-        level=logging.INFO,
-        format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
-    )
-
-    with Session(engine) as session:
-        try:
-            user = init_db(session)
-            if user:
-                print(f"✓ Database initialized successfully")
-                print(f"✓ Superuser: {user.email}")
-            else:
-                print("✗ Failed to initialize database")
-        except Exception as e:
-            print(f"✗ Error initializing database: {e}")
-            raise
-        finally:
-            session.close()