feat: add comprehensive jailbreak detection tests

Adds 05-jailbreak-test.py with comprehensive test coverage for jailbreak
detection across multiple classifier paths:

- Batch API security classification (ModernBERT path)
- Direct security endpoint testing
- ExtProc pipeline security validation
- Pattern analysis across multiple test cases

Features:
- Cache-busting with unique test cases per run
- Clear documentation of expected results per path
- Detailed logging of classifier behavior differences
- Comprehensive security gap analysis

Tests expose critical security vulnerabilities where jailbreak content
bypasses detection and reaches LLM backends, generating harmful responses.

Co-Authored-By: Claude <[email protected]>

Signed-off-by: Yossi Ovadia <[email protected]>

Author: yossiovadia