fix(models): replace EmailStr with str, drop email-validator dependency

EmailStr pulled in email-validator + dnspython as transitive deps —
a third-party email validator inside an email validation SDK. The API
already validates the email; re-validating it client-side in the
response model is redundant and adds 2 unnecessary dependencies.

Using plain `str` for the email field in response models eliminates
the dependency that caused the original ImportError crash while also
producing a lighter, more correct SDK.

Author: jesse-validkit

requirements.txt

@@ -1,4 +1,4 @@
 aiohttp>=3.9.0
-pydantic[email]>=2.0.0
+pydantic>=2.0.0
 python-dotenv>=1.0.0
 typing-extensions>=4.8.0

setup.cfg

@@ -31,7 +31,7 @@ packages = find:
 python_requires = >=3.8
 install_requires =
     aiohttp>=3.9.0
-    pydantic[email]>=2.0.0
+    pydantic>=2.0.0
     python-dotenv>=1.0.0
     typing-extensions>=4.8.0
 

setup_minimal.py

@@ -16,7 +16,7 @@
     python_requires=">=3.8",
     install_requires=[
         "aiohttp>=3.9.0",
-        "pydantic[email]>=2.0.0",
+        "pydantic>=2.0.0",
         "python-dotenv>=1.0.0",
         "typing-extensions>=4.8.0",
     ],

validkit/models.py

@@ -3,7 +3,7 @@
 from typing import Optional, List, Dict, Any, Union
 from datetime import datetime
 from enum import Enum
-from pydantic import BaseModel, Field, EmailStr, validator
+from pydantic import BaseModel, Field, validator
 
 
 class ResponseFormat(str, Enum):
@@ -58,7 +58,7 @@ class SMTPCheck(BaseModel):
 class EmailVerificationResult(BaseModel):
     """Full email verification result"""
     success: bool
-    email: EmailStr
+    email: str
     valid: bool
 
     # Detailed checks