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/fix_channels.py

@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+"""Fix NewAPI channel types and remove expired channels."""
+
+from newapi_client import update_channel, delete_channel, test_channel
+from channels_config import FIX_TABLE
+
+
+# ─── Fix channel types to OpenAI (type 1) ────────────────────────
+print("=== Fixing channel types to OpenAI (type 1) ===\n")
+for cid, name, new_type, base_url in FIX_TABLE:
+    success, msg = update_channel(cid, type=new_type, base_url=base_url)
+    print(f"  ID={cid:2d} {name:30s} -> type={new_type} base_url={base_url}  "
+          f"{'✅' if success else '❌'} {msg}")
+
+# ─── Delete expired Baidu Qianfan ────────────────────────────────
+print("\n=== Deleting expired Baidu Qianfan ===")
+success, msg = delete_channel(13)
+print(f"  ID=13 BaiduQianfan-Coding  {'✅' if success else '❌'} {msg}")
+
+# ─── Re-test all fixed channels ──────────────────────────────────
+print("\n=== Testing fixed channels ===\n")
+test_ids = [6, 7, 8, 9, 10, 11, 12]  # 11=VolcanoArk-CodingPlan (already working)
+for cid in test_ids:
+    print(f"  ID={cid:2d}...", end=" ", flush=True)
+    success, msg, _ = test_channel(cid)
+    print(f"{'✅' if success else '❌'} {msg[:80]}")