Gemini CLI v0.64.0

Atomic Operations & State Persistence: Serialized file tool operations with atomic writes and introduced atomic CLI state persistence with automatic recovery from backup on corruption ( #29499 by @elberthc-byte, #29558 by @urielefrenvirtusa).

Chat Recording Optimization: Implemented append-only delta patching and bounded history windowing in ChatRecordingService to optimize memory and disk efficiency during long-running sessions ( #29568 by @jvargassanchez-dot).

CLI Interaction & Input Robustness: Resolved @file:line references, prevented CPU hangs on @ in code blocks, and ensured Ctrl+C emergency aborts reliably reach cancellation handlers ( #29581 by @jesussamuel-byte, #29586 by @urielefrenvirtusa).