fix: add EmailStr validation to base schema

Change email field from str to EmailStr for proper email validation
at the schema level. This provides consistent validation across all
user schemas that inherit from UserBase.

Also updates test to expect 422 (Pydantic validation) instead of
400 (application validation) for invalid email addresses.

Author: seapagan

app/schemas/base.py

@@ -1,6 +1,6 @@
 """Define the Base Schema structures we will inherit from."""
 
-from pydantic import BaseModel, ConfigDict, Field
+from pydantic import BaseModel, ConfigDict, EmailStr, Field
 
 from app.schemas.examples import ExampleUser
 
@@ -10,4 +10,4 @@ class UserBase(BaseModel):
 
     model_config = ConfigDict(from_attributes=True)
 
-    email: str = Field(examples=[ExampleUser.email])
+    email: EmailStr = Field(examples=[ExampleUser.email])

tests/integration/test_auth_routes.py

@@ -162,8 +162,8 @@ async def test_register_new_user_with_bad_email(
             },
         )
 
-        assert response.status_code == status.HTTP_400_BAD_REQUEST
-        assert response.json()["detail"] == "This email address is not valid"
+        assert response.status_code == status.HTTP_422_UNPROCESSABLE_CONTENT
+        # EmailStr validation provides a standard Pydantic error message
 
         user_from_db = await test_db.get(User, 1)
         assert user_from_db is None