chore: Sentinel security audit completed without findings

A full security audit was performed across the codebase using Bandit and manual inspection. No actual vulnerabilities were identified; the warnings flagged by Bandit were confirmed to be expected false positives isolated entirely within mock data in the unit test suite (`test_testping1.py`). As no legitimate security concerns were present, no codebase changes were necessary or made. Tests pass successfully.

Co-authored-by: ManupaKDU <95234271+ManupaKDU@users.noreply.github.com>

Author: google-labs-jules[bot]