chore: 去掉 Bun，切换到 pnpm + 纯 Node runtime

- bun.lock → pnpm-lock.yaml + pnpm-workspace.yaml
- 删除 sqlite-adapter.ts（Bun/Node 双 runtime 兼容层，未被使用）
- package.json 删除 workspaces 字段，加 pnpm.onlyBuiltDependencies
- 加 vite 8 显式依赖（vitest 4.x peer dep）
- CLAUDE.md 全面更新：Runtime/Commands/Release 流程
- .gitignore 加 bun.lock

36/36 files pass, 617/617 tests pass

Fixes #66

package.json

@@ -1,14 +1,12 @@
 {
   "name": "@ocas/workspace",
   "private": true,
-  "workspaces": [
-    "packages/*"
-  ],
   "devDependencies": {
     "@shazhou/proman": "0.2.0",
     "@types/node": "^25.9.1",
     "tsx": "^4.22.4",
     "ulidx": "^2.4.1",
+    "vite": "^8.0.16",
     "vitest": "^4.1.8"
   },
   "scripts": {
@@ -24,5 +22,11 @@
   "homepage": "https://github.com/shazhou-ww/ocas",
   "bugs": {
     "url": "https://github.com/shazhou-ww/ocas/issues"
+  },
+  "pnpm": {
+    "onlyBuiltDependencies": [
+      "esbuild",
+      "better-sqlite3"
+    ]
   }
 }