5b41d32f90
Adds validation to webhook URLs before attempting to deliver them to prevent SSRF attacks targeting private IP ranges, local host, and cloud metadata endpoints. Validates URL schema, hostname, and applies `is_private_ip()`. Also resolved ruff linting errors. Tests have been expanded to ensure validation covers all cases. Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>