Add LLM key-hunter toolkit, vault, and skill

- tools/scripts/llm-key-hunter: GitHub leak hunting pipeline (hunt_*,
  pivot miner, two-layer verify/content caches, per-provider verification)
- usable_keys: verified key vault across 12 providers (deepseek, minimax,
  volcanoark, longcat, codingplan, zhipu free-tier, mimo, siliconflow, etc.)
- .grok/skills/llm-key-hunter: operator skill for the hunt/verify/vault flow
- NewAPI channel import scripts and CDP capture helpers
- Result verdict buckets (excluding multi-GB blob caches and dedup dumps)

tools/scripts/llm-key-hunter/results/zhipu_glm52_live/no_access.txt

@@ -0,0 +1 @@
+624cbf55af4d410da595ec0f008feae7.KXSI4QpyCAM41zRK	/home/chaos/projects/hack/tools/scripts/llm-key-hunter/results/extracted_keys.txt	403: {"error":{"code":"1220","message":"您的请求无法被处理，因为您的IP地址没有接口访问权限。如果您认为这是一个错误，请联系客服获取帮助。"}}