Fix validation helpers for input sanitization

Automated MR from stress test

Branch: bugfix-validation-helpers

This MR contains code changes for testing webhooks and CI/CD pipeline.

Summary by Bito

• Added a new validation_helpers.py file containing utility classes and functions for data validation.
• Implemented validators for email addresses, phone numbers, passwords, URLs, and credit cards using regex patterns and algorithms like Luhn.
• Included a decorator for input validation, along with functions for sanitizing inputs, validating ranges, and batch processing data.