fix: move email-validator to main dependencies

- email-validator is required at runtime for EmailStr validation in production schemas
- RegisterRequest and LoginRequest use EmailStr in auth routes
- Removing redundant httpx from test extras (already in main deps)

Fixes critical dependency issue identified in #1605 review

Co-authored-by: Mervin Praison <[email protected]>

src/praisonai-platform/pyproject.toml

@@ -22,6 +22,7 @@ dependencies = [
     "uvicorn>=0.34.0",
     "httpx>=0.27.0",
     "pydantic>=2.10.0",
+    "email-validator>=2.0",
 ]
 
 [project.optional-dependencies]
@@ -33,7 +34,6 @@ postgres = [
 test = [
     "pytest>=8.0",
     "pytest-asyncio>=0.23.0",
-    "httpx>=0.27.0",
 ]
 
 [tool.setuptools.packages.find]