v1.27.1

Patch release on top of v1.27.0.

What's Changed

• fix(llm): don't emit explicit cache_control markers for Gemini by @VascoSch92 in #3586

Cherry-picked onto v1.27.0 for the OpenHands Enterprise release; contains no other changes from main.

Full Changelog: v1.27.0...v1.27.1