Data-only contributions: per-model JSON registry, validation, PR CI

Contributors no longer touch site code. Model registration moves from
cases.ts literals to repo-root models/<model-id>.json files (filename =
model id = outputs/ folder); cases move to cases.json; cases.ts now just
derives MODELS/RUNS via import.meta.glob. Parallel PRs stop conflicting
because each model owns its own file.

scripts/validate-data.ts runs inside `bun run build` and a new PR CI
workflow: dash-only ids, required bilingual provenance note per run,
declared artifacts must exist, no orphan outputs/ dirs.

Also: run notes render whitespace-pre-wrap (multi-line notes, idea from
PR #2), README contribution guide rewritten around the JSON template,
CLAUDE.md updated, OG card refreshed for the DeepSeek merge.

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

models/gpt-5-5-xhigh.json

@@ -0,0 +1,13 @@
+{
+  "label": "GPT-5.5 xhigh",
+  "vendor": "OpenAI",
+  "order": 30,
+  "runs": {
+    "mythos-craft": {
+      "note": {
+        "zh": "全程在 Codex CLI 中生成（未使用任何 skill）；本页为修复版（仅改 1 行）。问题：移动向量的 Z 分量整体差一个负号（第 979 行，正确应为 -strafe*sin - forward*cos）。修复前：运动被沿 X 轴镜像——面朝 ±X 方向时按 A/D 左右颠倒，面朝 ±Z 时 W/S 前后颠倒，体感「左右移动方向不对」。原因：Three.js 相机在 yaw=0 时朝 -Z，推导前进/侧移向量时把这个约定弄反了。给 Z 分量取负后，任意朝向下八方向移动全部正确。",
+        "en": "Generated entirely in Codex CLI (no skills); fixed build (1 line changed). Bug: the movement vector's Z component had its sign flipped (line 979; correct form is -strafe*sin - forward*cos). Before the fix movement was mirrored across the X axis — A/D swapped when facing +-X, W/S swapped when facing +-Z, i.e. \"strafing goes the wrong way\". Cause: a Three.js camera faces -Z at yaw 0, and the forward/right derivation inverted that convention. Negating Z makes all eight directions correct at any heading."
+      }
+    }
+  }
+}