feat: add support for configurable histogram buckets #22
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Add opt-in histogram metrics with configurable bucket boundaries to enable accurate percentile calculations (p50, p95, p99) for latency monitoring. Changes: - Add PROMETHEUS_USE_HISTOGRAMS config option (default: False for backwards compatibility) - Add PROMETHEUS_LATENCY_BUCKETS config for customizable bucket boundaries - Convert timing values from milliseconds to seconds per Prometheus best practices - Update metrics implementation to support both Summary and Histogram modes - Add comprehensive test coverage for histogram functionality - Update documentation with migration guide and usage examples Default buckets: [0.05, 0.1, 0.25, 0.5, 1.0, 2.5, 5.0, 10.0, 30.0, 60.0] seconds Maintains full backwards compatibility - existing installations continue using Summary metrics unless explicitly opted-in to histograms. Resolves: Feature request for configurable latency histogram buckets
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Add opt-in histogram metrics with configurable bucket boundaries to enable accurate percentile calculations (p50, p95, p99) for latency monitoring.
Changes:
Default buckets: [0.05, 0.1, 0.25, 0.5, 1.0, 2.5, 5.0, 10.0, 30.0, 60.0] seconds
Maintains full backwards compatibility - existing installations continue using Summary metrics unless explicitly opted-in to histograms.
Resolves: Feature request for configurable latency histogram buckets