Confirm Opus 4.8 provenance (Claude Code, Max); fresh Turnstile token per sync batch

Turnstile tokens are single-use — the old implementation memoized one
token forever, so every batch after the first would fail verification.
Each sync now runs a fresh invisible challenge, and vote syncing is
debounced 2.5s so rapid ballots coalesce into one batch + one challenge.
OG count 16 -> 17 ran.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

models/claude-opus-4-8.json

@@ -5,10 +5,12 @@
   "runs": {
     "pelican-cycling": {
       "note": {
-        "zh": "以 Claude Opus 4.8 一次生成；运行环境与思考档位待维护者补充。",
-        "en": "Generated in one shot by Claude Opus 4.8; harness and effort level to be confirmed by the maintainer."
+        "zh": "在 Claude Code 中以 Claude Opus 4.8（Max 思考配额）一次生成。",
+        "en": "Generated in one shot by Claude Opus 4.8 (Max effort) inside Claude Code."
       },
       "contributor": "Nagi-ovo"
     }
-  }
+  },
+  "harness": "Claude Code",
+  "effort": "Max"
 }