Convex 完整插件 marketplace

完整现行构建是 marketplace add get-convex/convex-codex-plugin，再 plugin add convex@convex-codex-plugin。openai-curated 只是轻量连接器。

codex plugin marketplace add get-convex/convex-codex-plugin
codex plugin add convex@convex-codex-plugin
codex plugin list