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/live/intl/ollama/keys.txt

@@ -0,0 +1,5 @@
+a3f899539f3c4effad78e220462be7a6.fVn8luLNb206KKkpYgAs9JRR
+a2f97ef2effa4c5fbc99f3374aeb35b3.LlcoRRIcf4rFaBbVsaFR4DPI
+ddfcf68a6cd14dd884edc1528234b441.oO5a2DybyZW8BC7kAccyxW9F
+cc4a64015b7447d8b485afd8bb456481.YIJcXkZS8DOYdJlRr3EgonVC
+b7f1ae9d95a64bb8811d93ce8ffb8c3a.37sbMOoo5yt1KYvrBtWu5NLZ