CLI Proxy API 6.6.49 አውርድ

Changelog
- 7569320770b89f707717b3b42b534af501e1a1a7 Merge branch 'dev' into fix/antigravity-prompt-caching
- 24e8e20b5919e5c9a0b06a6bcd56a76276ba2bc6 Merge branch 'main' into fix/antigravity-prompt-caching
- 6dd1cf1dd639ec3fb014ee990a0a7fd31c0adc2d Merge branch 'main' into fix/antigravity-prompt-caching
- 9617a7b0d61bb5405b34c619c7852c34757255d0 Merge pull request #621 from dacsang97/fix/antigravity-prompt-caching
- 2e538e3486b7b260b2a5156ec73893ed671fde36 Merge pull request #661 from jroth1111/fix/streaming-bootstrap-forwarder
- bc6c4cdbfc68cecbf426742365f608af9be2c7d2 feat(antigravity): add logging for cached token setting errors in responses
- a87f09bad21ce33c6b38c93028f66d99458116e5 feat(antigravity): add session ID generation and mutex for random source
- 9058d406a35d691b97324c6200839bb776d65916 feat(antigravity): enhance prompt caching support and update agent version
- 66769ec657e0a636625a57456d8c0183d4fcf20f fix(translators): update role from tool to user in Gemini and Gemini-CLI requests
- 71a6dffbb6299c92646ed371becb16514c50bce6 fix: improve streaming bootstrap and forwarding
- 5bf89dd757bcc591ae1359aff4b50d935188673a fix: keep streaming defaults legacy-safe
- 4442574e53becb7850a0778de18d715157bdde05 fix: stop streaming loop on context cancel
- 404546ce9346c24e3cfb4f4a317b66be10991441 refactor(antigravity): regarding production endpoint caching
- f413feec618ebe3288d98f2449bfb8f0ab21b6a2 refactor(handlers): streamline error and data channel handling in streaming logic