test(novita): cache pricing, add provider test coverage, AUTHOR_MAP entry

Follow-up to Alex-wuhu's NovitaAI provider commit. Adds:

- _pricing_cache hit/write in _fetch_novita_pricing (was missing — every
  pricing fetch was re-hitting the network), mirroring the
  fetch_ai_gateway_pricing pattern. force_refresh now also propagates
  from get_pricing_for_provider.
- TestNovitaProvider in tests/hermes_cli/test_api_key_providers.py
  covering profile load, alias resolution, registry auto-registration,
  model list parity between main.py and models.py, _URL_TO_PROVIDER,
  _PROVIDER_PREFIXES, context_size in _CONTEXT_LENGTH_KEYS, pricing
  unit conversion, and pricing cache behavior.
- AUTHOR_MAP entry for yanglongwei06@gmail.com → @Alex-yang00.

scripts/release.py

@@ -55,6 +55,7 @@ AUTHOR_MAP = {
     "leone.parise@gmail.com": "leoneparise",
     "mr@shu.io": "mrshu",
     "buraysandro9@gmail.com": "ygd58",
+    "yanglongwei06@gmail.com": "Alex-yang00",
     "teknium@nousresearch.com": "teknium1",
     "piyushvp1@gmail.com": "thelumiereguy",
     "421774554@qq.com": "wuli666",