llmAntidote v3.2.4

Addresses the Hermes plugin-catalog review blocker at 2070999.

• Fix a denial-of-service in the environment_secret detection regex
  (llm_antidote/policy.py): the unbounded (?:\S*/)?env\b alternative
  backtracked quadratically on long single-line tool arguments (a ~100 KB run of
  ; took seconds per assess() while holding the GIL, stalling the whole
  agent). Replaced with a bounded path form,
  (?:^|[\s;&|])(?:[^\s;&|/]{0,256}/){0,16}env\b, which still detects env,
  /usr/bin/env, and friends but in linear time.
• Add tests/test_policy_performance.py, timing the full sensitive-pattern set
  plus _UPLOAD_SINK/_DOWNLOAD_EXECUTE (and _NETWORK_SINK/_REVERSE_SHELL)
  on ";"*150_000 and "x=1;"*40_000, plus an end-to-end double assess(),
  asserting a sub-second budget.

Before: ~4.4 s at 50 KB for the env pattern alone. After: ~34 ms at 150 KB.