Refactor key rotator and merge kimi-coding with moonshot

Restore LLM_MODEL picker type and catalog binding

Fix gateway/telegram config bugs and stabilize WhatsApp + key rotator flows

Add support for multiple new API providers

Update auth header injection in request options

Refactor header handling in multi-provider key rotator

Enhance Gemini API key handling with query param support

Set LLM_API_KEY fallback default to enabled

Keep key rotator logs off stdout

fix(key-rotator): suppress LLM_API_KEY fallback noise in startup logs

update rotator and startup files