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feat(metrics): emit per-request metrics on the pass-through path - #80
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Add GuardTransform::with_metrics(MetricsCollector). A response the next service produces for a request the guard let through now emits the reference collect_request_metrics samples: request_count, response_time (stopping when the response head is back, like the reference stopping at response start) and error_rate for a >= 400 status. Guard blocks and exclude_paths bypasses emit nothing.
…syntax The guard-core-rs engine is adding fields to DetectionExclusionConfig. The spread keeps this literal compiling against both the current engine and the one with the new field.
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Closes #79
feat(metrics):GuardTransform::with_metrics(MetricsCollector). A response the next service produces for a request the guard let through emits the referencecollect_request_metricssamples:request_count,response_time(from the request reaching the guard until the response head is back, like the reference stopping at response start) anderror_ratefor a>= 400status, tagged with the path and method. Guard blocks andexclude_pathsbypasses emit nothing. The collector owns theagent_enable_metricsgate and the transport, and the transform owns no agent slot, so the caller supplies the collector.fix(config): theDetectionExclusionConfigliteral infrom_security_confignow spreads..DetectionExclusionConfig::default(). The open guard-core-rs PR fix(detection): port the verified guard-core reference fixes (passive log reason, semantic header opt-out, Cookie pair scan) guard-core-rs#137 adds a field to that struct, and this keeps the adapter compiling against both the current engine and the new one.