feat: implement identity and security features

- Added account types and privileged account types constants.
- Created admin user controller for updating user security fields.
- Developed role assignment controller for managing user roles.
- Implemented validation middleware for request schemas.
- Defined user role and auth session models for database interactions.
- Created services for authentication, email notifications, and OTP handling.
- Developed OAuth service for Google and Apple authentication.
- Added JWT utility functions for token generation and verification.
- Implemented comprehensive tests for authentication, session management, and password policies.
- Created migration for updating user schema and adding new tables for auth sessions and user identities.

app/middleware/validate.middleware.js

@@ -0,0 +1,7 @@
+module.exports = (schema) => (req, _res, next) => {
+  try {
+    req.validated = schema.parse({ body: req.body, params: req.params, query: req.query });
+    req.body = req.validated.body;
+    next();
+  } catch (error) { next(error); }
+};