v2.0.0-rc.50

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

• docs(readme): replace chief sponsor banners by @tbphp in #869
• fix(web): show retained credential failure details by @tbphp in #870
• fix(logs): compact and unify modern log popovers by @tbphp in #871
• fix(subscription): filter CPA import fields by channel by @tbphp in #873
• fix(subscription): restore cooldowns when quota recovers by @tbphp in #874
• fix(logs): preserve upstream response model observations by @tbphp in #877

Full Changelog: v2.0.0-rc.49...v2.0.0-rc.50