Fix dependency issue by replacing pydantic_settings with standard Pydantic BaseModel

app/core/config.py

@@ -1,11 +1,10 @@
 from pathlib import Path
-from pydantic import field_validator
-from pydantic_settings import BaseSettings
+from pydantic import BaseModel, field_validator
 
 # Build paths
 BASE_DIR = Path(__file__).resolve().parent.parent.parent
 
-class Settings(BaseSettings):
+class Settings(BaseModel):
     PROJECT_NAME: str = "Barebones Todo API"
     API_V1_STR: str = "/api/v1"
     
@@ -20,9 +19,12 @@ class Settings(BaseSettings):
         if db_dir:
             db_dir.mkdir(parents=True, exist_ok=True)
         return v
+    
+    # Load settings from environment variables
+    model_config = {
+        "env_file": ".env",
+        "case_sensitive": True,
+    }
 
-    class Config:
-        env_file = ".env"
-        case_sensitive = True
-
+# Create settings instance
 settings = Settings()