FIX Include subdirectory jailbreak templates in listings

[biefan]

Summary

• List jailbreak templates from the cached recursive template scan instead of only the top-level directory
• Add regression coverage for subdirectory template discovery in both TextJailBreak and the AIRT jailbreak scenario
• Fix random.choices (with replacement) to random.sample (without replacement) in get_jailbreak_templates() to avoid returning duplicate template names
• Return templates in sorted order for cross-platform determinism

Problem

TextJailBreak already resolves template names from subdirectories such as pliny/amazon/nova.yaml, but get_jailbreak_templates() only scans templates/*.yaml at the top level.

This creates an inconsistent API surface: a template name can be loaded successfully via template_file_name, but the same name is missing from the advertised template list and is rejected by Jailbreak(..., jailbreak_names=[...]) validation.

Changes

text_jailbreak.py

• Replace JAILBREAK_TEMPLATES_PATH.glob('*.yaml') with cls._get_template_cache().keys() in get_jailbreak_templates() to include subdirectory templates (72 previously-invisible templates now appear, 162 total vs 90 top-level)
• Wrap result in sorted() for deterministic cross-platform ordering (previously depended on filesystem glob order)
• Fix random.choices to random.sample so num_templates returns distinct templates without duplicates

Tests

• Add structural regression test verifying subdirectory templates appear in the listing (checks count exceeds top-level-only count, not hardcoded to a specific file)
• Add scenario-level test verifying Jailbreak(jailbreak_names=[...]) accepts subdirectory template names

Testing

pytest tests/unit/datasets/test_jailbreak_text.py tests/unit/scenarios/test_jailbreak.py -q