Native OpenTelemetry metrics for Redis client libraries

Redis has introduced native OpenTelemetry metrics support in its client libraries to enhance client-side observability, addressing the gap where server metrics alone cannot explain application performance issues. This new feature allows engineers to gain insights into various client-side behaviors such as connection activity, error occurrences, connection pool pressure, and client-side caching. The metrics are integrated with standard OpenTelemetry pipelines and are disabled by default to minimize overhead, which is kept under 1% when inactive. The system is designed to align with OpenTelemetry's semantic conventions for consistency, and it introduces Redis-specific metrics for unique client activities. Users can enable specific metric groups based on their debugging needs, allowing for precise control over performance and data cardinality. This release is available in redis-py v7.3.0+, go-redis v9.18.0+, and node-redis v5.12.0+, with a focus on practical troubleshooting and low-overhead implementation.

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