Optimizing Bitrise Build Cache clients

Bitrise Build Cache is a tool designed to accelerate build processes across various ecosystems, such as Bazel, Gradle, and Xcode, by optimizing the build cache clients and ensuring stability in fluctuating network environments. Initially developed for Bazel, it was extended to support Gradle and Xcode using custom APIs tailored to each platform's needs, facilitating efficient storage and retrieval of binary blobs. The system employs gRPC for high-performance communication, implementing robust strategies like smart retries, connection pooling, and partial transfer resumptions to handle I/O bottlenecks and maintain cache reliability without increasing build times. Connection initialization involves authentication and metadata handling to correlate cache activities with analytical data. Bitrise has enhanced client-side resilience by using exponential backoff and jitter for retries, validating content integrity, and integrating observability tools to log and diagnose errors promptly. These improvements have achieved a 99.99% service level objective, ensuring the cache's dependability as part of the core delivery pipeline. The platform's comprehensive enhancements allow teams to confidently integrate the Bitrise Build Cache into their workflows, offering both speed and reliability in continuous integration and development environments.