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feat: observability via OpenTelemetry tracing - #230
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Трассировка
Зачем
Сейчас, если запрос отвечает долго или падает, понять причину можно только по логам. А основное время NCANode проводит не в криптографии, а в походах наружу — за CRL, OCSP, TSP и сертификатами УЦ.
Как выглядит
Реальная трасса /cms/sign с cadesLevel=LT:
Сразу читается, куда ушли 6.5 секунд.
Что внутри
Micrometer Observation → OpenTelemetry → OTLP. Три источника span-ов:
серверные — автоматически от Spring Boot;
сервисные — аннотация
@Observedна методах, которые дёргают контроллеры, и на методах с походами наружу (ocsp verify, crl verify, ca build chain, tsp create);исходящие HTTP — обёртка над Apache HttpClient (TracedHttpRequestExecutor), потому что Micrometer сам HttpClient 4.x не инструментирует, а это как раз самая долгая часть.
Служебные пути (/actuator/**, Swagger) из трассировки исключены
Инструкцию указал в TRACING.md
Где больше шагов

Где медленно
