feat(patterns): expand jailbreak library from 53 to 79 patterns

[Pranjal0410]

Expands the jailbreak pattern library from 53 to 79 patterns. Went through Vibhor's adversarial corpus and added patterns to cover the gaps that were fixable without code changes.

What was added

25 new patterns. Focused on thin categories (encoding_bypass, memory_poisoning, tool_description_poisoning were all at 2) and known gaps from the adversarial corpus.

Known gaps

11 of 25 gaps now have pattern matches. The remaining 14 need code changes, not patterns:

• 3 are normalizer issues (homoglyph mapping, leetspeak 1→i fix, zero-width char handling)
• 6 need scan.go or policy updates (bare ampersand in shellMetachars, glob chars, sensitive path detection, destination allowlist config)
• 5 are architectural (semantic paraphrase, multilingual, secrets detection, key-namespace ACL, schema validation)

Tests

Go tests pass. OPA 102/102. Python SDK 109/109.