Release v4.6.24-beta.1

What's Changed

• fix(web): preserve custom token expiry timezone (bb274bb6)
• docs: add OpenAI-compatible upstream channel example (628845b2)
• fix(web): keep unchanged token expiry exact (51a56a33)
• docs: fix OpenAI-compatible channel example (de8b4e44)
• fix(csv): preserve channel websockets on round trip (b7d801a9)
• fix(proxy): isolate upstream sessions by thread (04ea621c)
• feat(antigravity): add Gemini 3.7 and dynamic Hub user agent (f77a7b7e)

Full Changelog: v4.6.23-beta.2...v4.6.24-beta.1