Fix Alembic migration error by adding project root to Python path and updating Pydantic config

- Added project root directory to Python path in alembic/env.py
- Updated Pydantic Settings class to use ClassVar typing for DB_DIR
- Updated Config class to new Pydantic v2 model_config format

generated with BackendIM... (backend.im)

alembic/env.py

@@ -1,4 +1,9 @@
 from logging.config import fileConfig
+import os
+import sys
+
+# Add the project root directory to the Python path
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
 
 from sqlalchemy import engine_from_config
 from sqlalchemy import pool

app/core/config.py

@@ -1,5 +1,5 @@
 from pathlib import Path
-from typing import List
+from typing import List, ClassVar
 
 from pydantic_settings import BaseSettings
 
@@ -18,7 +18,7 @@ class Settings(BaseSettings):
     JWT_ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
     
     # Database
-    DB_DIR = Path("/app") / "storage" / "db"
+    DB_DIR: ClassVar[Path] = Path("/app") / "storage" / "db"
     DB_DIR.mkdir(parents=True, exist_ok=True)
     SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
     
@@ -26,10 +26,11 @@ class Settings(BaseSettings):
     STRIPE_API_KEY: str = "your-stripe-api-key"
     STRIPE_WEBHOOK_SECRET: str = "your-stripe-webhook-secret"
 
-    class Config:
-        env_file = ".env"
-        env_file_encoding = "utf-8"
-        case_sensitive = True
+    model_config = {
+        "env_file": ".env",
+        "env_file_encoding": "utf-8",
+        "case_sensitive": True
+    }
 
 
 settings = Settings()