v2.0.0-beta.21

2.x is a rewrite and is not compatible with 1.x data, start 2.x from an empty database and a new encryption.key.

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2.x 是全新重写版本，与 1.x 数据不兼容，请以全新数据库和新的 encryption.key 部署 2.x。

What's Changed

• feat: 升级 Go 与 SDK 版本 by @tbphp in #485
• fix: 接入首个流错误安全切换 by @tbphp in #486
• feat(subscription): 接入 Codex/Claude 被动额度信号观察 by @tbphp in #487

Full Changelog: v2.0.0-beta.20...v2.0.0-beta.21